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Old 07-09-2016, 11:23 AM   #1
rblampain
Senior Member
 
Registered: Aug 2004
Location: Western Australia
Distribution: Debian 11
Posts: 1,288

Rep: Reputation: 52
unreliable internet connection


My wired internet connection works intermitently on my desktop, it works for a few minutes and then freezes for 10-15 minutes or it does the same thing the other way round. To solve the problem temporarily, I do a search on the internet - finds its frozen - then do something that does not involve the internet and check every now and then if I got an internet result, if not I resume the other job, if yes I do another internet search and so on.

My question is: How can I find what/who is at fault? (googling for "internet outages" leads nowhere - when the internet is available)

This connection works from Kalgoorlie Western Australia and the only (wire) Telco is Telstra who is currently notorious for its "outages". The ISP is TPG (they seem to have no problem reported).

Some months ago I had a similar problem and assumed the modem was faulty, I purchased a new one which gave exactly the same result, so it seems the problem is not the modem and it is not the PC since, at the time, I had the same problem on a desktop and on a laptop connected to the same phone line. When I lose the connection, this modem shows a red light, when working, they are all green. Rebooting the PC and reseting the modem change nothing.

Thank you for your help

Last edited by rblampain; 07-09-2016 at 11:25 AM.
 
Old 07-09-2016, 11:30 AM   #2
devilboy09
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Registered: Nov 2011
Location: Iran
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please post the output of netstat -na so we can help you
 
Old 07-10-2016, 11:50 AM   #3
rblampain
Senior Member
 
Registered: Aug 2004
Location: Western Australia
Distribution: Debian 11
Posts: 1,288

Original Poster
Rep: Reputation: 52
Thank you for your answer.
The output exceeds the 30000 char limit. Every line starting with a number has had "unix 2 [ ] STREAM CONNECTED " or "unix 3 [ ] STREAM CONNECTED " removed to fit within the limit.
I hope the result is still clear enough.
Code:
tcp6       0      0 :::80                   :::*                    LISTEN     
tcp6       0      0 :::57202                :::*                    LISTEN     
tcp6       0      0 :::22                   :::*                    LISTEN     
tcp6       0      0 ::1:25                  :::*                    LISTEN     
udp        0      0 0.0.0.0:812             0.0.0.0:*                          
udp        0      0 127.0.0.1:851           0.0.0.0:*                          
udp        0      0 0.0.0.0:5353            0.0.0.0:*                          
udp        0      0 0.0.0.0:44763           0.0.0.0:*                          
udp        0      0 0.0.0.0:1900            0.0.0.0:*                          
udp        0      0 0.0.0.0:59442           0.0.0.0:*                          
udp        0      0 0.0.0.0:68              0.0.0.0:*                          
udp        0      0 0.0.0.0:111             0.0.0.0:*                          
udp        0      0 192.168.0.2:123         0.0.0.0:*                          
udp        0      0 127.0.0.1:123           0.0.0.0:*                          
udp        0      0 0.0.0.0:123             0.0.0.0:*                          
udp        0      0 0.0.0.0:35159           0.0.0.0:*                          
udp6       0      0 :::51727                :::*                               
udp6       0      0 :::55936                :::*                               
udp6       0      0 :::812                  :::*                               
udp6       0      0 :::5353                 :::*                               
udp6       0      0 :::42486                :::*                               
udp6       0      0 :::111                  :::*                               
udp6       0      0 ::1:123                 :::*                               
udp6       0      0 fe80::e2cb:4eff:feb:123 :::*                               
udp6       0      0 :::123                  :::*                               
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node   Path
unix  2      [ ACC ]     STREAM     LISTENING     5902     /var/run/dbus/system_bus_socket
unix  2      [ ACC ]     STREAM     LISTENING     290577   @/tmp/dbus-epf1KREGI3
unix  2      [ ACC ]     STREAM     LISTENING     8083     @/tmp/.ICE-unix/3530
unix  2      [ ACC ]     STREAM     LISTENING     8287     @/tmp/.X11-unix/X0
unix  2      [ ACC ]     STREAM     LISTENING     8288     /tmp/.X11-unix/X0
unix  2      [ ACC ]     STREAM     LISTENING     9085     /tmp/ssh-REEHekgoWQx1/agent.3530
unix  2      [ ACC ]     STREAM     LISTENING     8084     /tmp/.ICE-unix/3530
unix  2      [ ACC ]     STREAM     LISTENING     10253    /tmp/pulse-CnwgaNBNh8r6/native
unix  2      [ ACC ]     STREAM     LISTENING     10255    /tmp/pulse-CnwgaNBNh8r6/dbus-socket
unix  2      [ ACC ]     STREAM     LISTENING     7006     /var/run/acpid.socket
unix  2      [ ACC ]     SEQPACKET  LISTENING     4191     /run/udev/control
unix  2      [ ACC ]     STREAM     LISTENING     1966949  /var/run/apache2/cgisock.2478
unix  2      [ ACC ]     STREAM     LISTENING     9196     /home/rene/.cache/keyring-lCoN28/pkcs11
unix  2      [ ACC ]     STREAM     LISTENING     5991     /var/run/sdp
unix  2      [ ACC ]     STREAM     LISTENING     6010     /var/run/avahi-daemon/socket
unix  2      [ ACC ]     STREAM     LISTENING     7406     @/tmp/gdm-session-PzUeXMiv
unix  2      [ ACC ]     STREAM     LISTENING     9096     @/tmp/dbus-ELje2LVcI9
unix  2      [ ACC ]     STREAM     LISTENING     8128     /home/rene/.cache/keyring-lCoN28/gpg
unix  2      [ ACC ]     STREAM     LISTENING     5552     /var/run/rpcbind.sock
unix  2      [ ACC ]     STREAM     LISTENING     8384     /var/run/minissdpd.sock
unix  2      [ ACC ]     STREAM     LISTENING     9012     /home/rene/.cache/keyring-lCoN28/control
unix  2      [ ACC ]     STREAM     LISTENING     9199     /home/rene/.cache/keyring-lCoN28/ssh
unix  17     [ ]         DGRAM                    5858     /dev/log
4673045  
4673044  
4671841  @/tmp/dbus-epf1KREGI3
4672966  
4671822  @/tmp/dbus-epf1KREGI3
4671821  
4671662  @/tmp/dbus-ELje2LVcI9
4672858  
4671660  @/tmp/.X11-unix/X0
4671659  
4672796  /var/run/dbus/system_bus_socket
4671637  
unix  2      [ ]         DGRAM                    4671634  
4672794  @/tmp/dbus-ELje2LVcI9
4672793  
4672770  @/tmp/dbus-ELje2LVcI9
4672769  
4672663  @/tmp/.X11-unix/X0
4671605  
unix  2      [ ]         STREAM     CONNECTED     4567397  
4557199  
4533178  
4523176  
4509549  
4509489  
4506582  
4399207  
4397901  
4392563  
4392557  
4392432  
4391322  
4391316  
4391310  
4391304  
4386876  
4257669  
4257663  
4257363  
4256371  
4256361  
4256352  
4256346  
4249202  
4249188  
4249182  
4249176  
4249170  
4249164  
4248918  
4248912  
4248906  
4248900  
4248894  
4248888  
4222999  
4222989  
4222983  
4222977  
4222971  
4222965  
4222662  
4222652  
4222646  
4222639  
4222633  
4221707  
4222322  
4222313  
4222307  
4222301  
4222295  
4222289  
4060194  @/dbus-vfs-daemon/socket-3f16vaxI
4059467  
4060193  @/dbus-vfs-daemon/socket-LtuN4Ekk
4059466  
4059055  @/dbus-vfs-daemon/socket-Qj4KMkSE
4059364  
4059056  @/dbus-vfs-daemon/socket-kzW8yJsN
4059363  
4059051  @/dbus-vfs-daemon/socket-ZKBhzYl3
4059362  
4059052  @/dbus-vfs-daemon/socket-rDA0x8EW
4059361  
4059050  @/tmp/dbus-ELje2LVcI9
4059358  
4059047  @/tmp/dbus-ELje2LVcI9
4059356  
4059355  @/tmp/dbus-ELje2LVcI9
4059044  
4059043  @/tmp/dbus-ELje2LVcI9
4059354  
4059327  @/tmp/.X11-unix/X0
4059319  
2298655  
2298654  
1872460  
1872454  
1872448  
1872442  
1873436  
1873430  
unix  2      [ ]         DGRAM                    1357466  
759967   @/tmp/dbus-ELje2LVcI9
758446   
291056   /var/run/dbus/system_bus_socket
290600   
291053   @/tmp/dbus-epf1KREGI3
290599   
291040   @/tmp/.X11-unix/X0
291039   
291038   
291037   
291035   @/tmp/.X11-unix/X0
290567   
139086   
139085   
137117   @/tmp/dbus-ELje2LVcI9
139059   
137116   @/tmp/dbus-ELje2LVcI9
139058   
137115   @/tmp/.ICE-unix/3530
139057   
137114   @/tmp/dbus-ELje2LVcI9
139056   
137112   @/tmp/.X11-unix/X0
139055   
136638   /tmp/pulse-CnwgaNBNh8r6/native
137644   
133301   @/tmp/dbus-ELje2LVcI9
132851   
132703   @/tmp/dbus-ELje2LVcI9
132702   
133136   @/tmp/dbus-ELje2LVcI9
132701   
132672   @/tmp/dbus-ELje2LVcI9
132080   
132075   
132074   
132655   @/tmp/dbus-ELje2LVcI9
132073   
132072   @/tmp/.ICE-unix/3530
132654   
132070   @/tmp/.X11-unix/X0
132644   
132369   @/tmp/dbus-ELje2LVcI9
131661   
132242   @/tmp/dbus-ELje2LVcI9
131507   
131505   @/tmp/dbus-ELje2LVcI9
132241   
124564   /tmp/pulse-CnwgaNBNh8r6/native
123489   
120211   @/tmp/dbus-ELje2LVcI9
121365   
121112   @/tmp/dbus-ELje2LVcI9
121111   
120136   @/tmp/.ICE-unix/3530
121110   
120135   @/tmp/dbus-ELje2LVcI9
121109   
120133   @/tmp/.X11-unix/X0
121108   
25292    /home/rene/.cache/keyring-lCoN28/pkcs11
24459    
24457    @/tmp/dbus-ELje2LVcI9
24456    
25291    @/tmp/dbus-ELje2LVcI9
24455    
25290    /var/run/dbus/system_bus_socket
24453    
25288    @/tmp/dbus-ELje2LVcI9
25287    
24437    @/tmp/.ICE-unix/3530
25286    
25285    @/tmp/dbus-ELje2LVcI9
24436    
24432    @/tmp/.X11-unix/X0
25284    
unix  2      [ ]         DGRAM                    22982    
12912    @/tmp/dbus-ELje2LVcI9
11574    
11571    @/tmp/dbus-ELje2LVcI9
12911    
9970     /home/rene/.cache/keyring-lCoN28/pkcs11
10885    
9961     /var/run/dbus/system_bus_socket
10847    
9956     @/tmp/.ICE-unix/3530
10838    
9955     @/tmp/.X11-unix/X0
10837    
9954     @/tmp/dbus-ELje2LVcI9
10834    
9952     @/tmp/.X11-unix/X0
10833    
10744    /var/run/dbus/system_bus_socket
9813     
9808     /var/run/dbus/system_bus_socket
10739    
9807     @/tmp/dbus-ELje2LVcI9
10738    
10663    /home/rene/.cache/keyring-lCoN28/pkcs11
10661    
9762     /var/run/dbus/system_bus_socket
10660    
9760     @/tmp/dbus-ELje2LVcI9
10659    
9756     @/tmp/dbus-ELje2LVcI9
10654    
10649    @/tmp/dbus-ELje2LVcI9
9755     
unix  2      [ ]         DGRAM                    10648    
10647    @/tmp/dbus-ELje2LVcI9
9754     
10643    @/tmp/dbus-ELje2LVcI9
9752     
9749     @/tmp/dbus-ELje2LVcI9
10640    
9744     @/tmp/dbus-ELje2LVcI9
10639    
10636    @/tmp/dbus-ELje2LVcI9
9743     
9742     @/tmp/dbus-ELje2LVcI9
10634    
9741     @/tmp/dbus-ELje2LVcI9
10626    
9740     @/tmp/dbus-ELje2LVcI9
10625    
10624    @/tmp/dbus-ELje2LVcI9
9739     
9735     @/tmp/.X11-unix/X0
10623    
9734     /tmp/pulse-CnwgaNBNh8r6/native
10622    
10611    @/tmp/dbus-ELje2LVcI9
10610    
9727     /home/rene/.cache/keyring-lCoN28/pkcs11
10606    
9726     @/tmp/dbus-ELje2LVcI9
10605    
9725     /var/run/dbus/system_bus_socket
10604    
9724     @/tmp/dbus-ELje2LVcI9
10603    
9723     @/tmp/.ICE-unix/3530
10602    
9722     @/tmp/dbus-ELje2LVcI9
10601    
10594    @/tmp/.X11-unix/X0
10593    
9705     @/tmp/.X11-unix/X0
10591    
10586    @/tmp/dbus-ELje2LVcI9
9698     
9697     @/tmp/dbus-ELje2LVcI9
10584    
9695     @/tmp/.X11-unix/X0
10581    
10580    @/tmp/dbus-ELje2LVcI9
9692     
10577    /var/run/dbus/system_bus_socket
9690     
10576    @/tmp/dbus-ELje2LVcI9
9689     
10574    @/tmp/.X11-unix/X0
9686     
9611     /var/run/dbus/system_bus_socket
10520    
9610     @/tmp/dbus-ELje2LVcI9
9609     
10519    @/tmp/dbus-ELje2LVcI9
10518    
9607     @/tmp/dbus-ELje2LVcI9
10492    
9606     @/tmp/dbus-ELje2LVcI9
9605     
10490    @/tmp/.X11-unix/X0
10489    
9603     @/tmp/dbus-ELje2LVcI9
10488    
9579     /var/run/dbus/system_bus_socket
10456    
10455    @/tmp/dbus-ELje2LVcI9
9578     
10454    @/tmp/dbus-ELje2LVcI9
9577     
9572     @/tmp/dbus-ELje2LVcI9
9571     
10452    @/tmp/.X11-unix/X0
10451    
10450    @/tmp/dbus-ELje2LVcI9
9547     
10446    /var/run/dbus/system_bus_socket
9546     /var/run/dbus/system_bus_socket
9545     
10445    
10444    @/tmp/dbus-ELje2LVcI9
10443    
10442    @/tmp/dbus-ELje2LVcI9
9544     
10441    @/tmp/dbus-ELje2LVcI9
9542     
9538     @/tmp/.X11-unix/X0
9537     
10410    @/tmp/dbus-ELje2LVcI9
9509     
9505     @/tmp/.X11-unix/X0
10409    
9480     @/tmp/dbus-ELje2LVcI9
10408    
10407    @/tmp/dbus-ELje2LVcI9
9479     
9475     @/tmp/.X11-unix/X0
10406    
10355    @/tmp/.ICE-unix/3530
10354    
10351    @/tmp/dbus-ELje2LVcI9
9392     
9378     /var/run/dbus/system_bus_socket
10343    
9375     @/tmp/dbus-ELje2LVcI9
10338    
10335    /var/run/dbus/system_bus_socket
9371     
10334    /var/run/dbus/system_bus_socket
10333    
9370     @/tmp/dbus-ELje2LVcI9
10331    
10322    /var/run/dbus/system_bus_socket
10321    
10317    @/tmp/dbus-ELje2LVcI9
10316    
9330     @/tmp/dbus-ELje2LVcI9
10315    
10314    @/tmp/dbus-ELje2LVcI9
9329     
9327     @/tmp/.X11-unix/X0
10313    
10309    @/tmp/.ICE-unix/3530
9302     
9301     @/tmp/dbus-ELje2LVcI9
10308    
9299     @/tmp/.X11-unix/X0
10305    
9264     @/tmp/dbus-ELje2LVcI9
10287    
9260     @/tmp/dbus-ELje2LVcI9
10283    
9258     @/tmp/dbus-ELje2LVcI9
10278    
9257     /var/run/dbus/system_bus_socket
10275    
9254     /var/run/dbus/system_bus_socket
10274    
9250     /var/run/dbus/system_bus_socket
10266    
9247     @/tmp/dbus-ELje2LVcI9
10262    
9245     @/tmp/dbus-ELje2LVcI9
10258    
10256    /tmp/pulse-CnwgaNBNh8r6/native
9244     
9243     /var/run/dbus/system_bus_socket
10254    
9240     @/tmp/dbus-ELje2LVcI9
10244    
9212     /var/run/dbus/system_bus_socket
9233     
8186     @/tmp/dbus-ELje2LVcI9
9200     
8185     @/tmp/dbus-ELje2LVcI9
9192     
9171     @/tmp/dbus-ELje2LVcI9
8184     
9168     @/tmp/dbus-ELje2LVcI9
9167     
8182     @/tmp/dbus-ELje2LVcI9
9163     
9162     /var/run/dbus/system_bus_socket
8180     
9161     /var/run/dbus/system_bus_socket
9160     
8179     @/tmp/dbus-ELje2LVcI9
8178     
8176     @/tmp/.X11-unix/X0
9157     
9105     /var/run/dbus/system_bus_socket
9104     
8086     @/tmp/dbus-ELje2LVcI9
8085     
9101     @/tmp/dbus-ELje2LVcI9
8082     
9100     @/tmp/.X11-unix/X0
8081     
9097     @/tmp/.X11-unix/X0
8080     
8079     
8078     
8075     @/tmp/.X11-unix/X0
9086     
9023     /var/run/dbus/system_bus_socket
7987     
unix  2      [ ]         DGRAM                    7986     
unix  2      [ ]         DGRAM                    7937     
7821     @/tmp/gdm-session-PzUeXMiv
7820     
8879     /var/run/dbus/system_bus_socket
7819     
8877     /var/run/dbus/system_bus_socket
7818     
unix  2      [ ]         DGRAM                    7751     
7670     /var/run/dbus/system_bus_socket
8666     
unix  2      [ ]         DGRAM                    8665     
8526     /var/run/dbus/system_bus_socket
7530     
7527     /var/run/dbus/system_bus_socket
8525     
8442     /var/run/dbus/system_bus_socket
7438     
7419     /var/run/dbus/system_bus_socket
8438     
8423     /var/run/dbus/system_bus_socket
7415     
unix  2      [ ]         DGRAM                    8371     
8316     @/tmp/.X11-unix/X0
7329     
7328     /var/run/acpid.socket
8297     
7294     /var/run/dbus/system_bus_socket
8278     
7272     /var/run/dbus/system_bus_socket
8229     
7232     /var/run/dbus/system_bus_socket
6130     
unix  2      [ ]         DGRAM                    6129     
6118     /var/run/dbus/system_bus_socket
7226     
unix  2      [ ]         DGRAM                    7222     
7221     /var/run/dbus/system_bus_socket
6112     
7139     /var/run/dbus/system_bus_socket
7138     
unix  2      [ ]         DGRAM                    7135     
7102     /var/run/dbus/system_bus_socket
6012     
5986     
5985     
unix  2      [ ]         DGRAM                    5983     
7078     /var/run/dbus/system_bus_socket
5959     
unix  2      [ ]         DGRAM                    5958     
7023     
7022     
unix  2      [ ]         DGRAM                    5889     
6860     
6859     
unix  3      [ ]         DGRAM                    3437     
unix  3      [ ]         DGRAM                    3436
Today, I have been able to access the Internet nearly all day, it could be because it's Sunday and local businesses are closed however at sunset, the problem came back.

Last edited by rblampain; 07-10-2016 at 11:54 AM.
 
Old 07-10-2016, 12:10 PM   #4
Emerson
LQ Sage
 
Registered: Nov 2004
Location: Saint Amant, Acadiana
Distribution: Gentoo ~amd64
Posts: 7,661

Rep: Reputation: Disabled
The modem shows red light ... I doubt anything can be done about that in your computer.
 
1 members found this post helpful.
Old 07-10-2016, 08:10 PM   #5
jnihil
Member
 
Registered: Dec 2012
Location: inside the matrix
Distribution: Debian, Xubuntu, Gentoo, Antergos
Posts: 90

Rep: Reputation: 27
I must agree with Emerson.
Findout the peer IP address of the modem connection, and leave a continuous ping running.
Code:
ping -s1400 -i2 <remote-ip>
If it stops for extended periods, your dial-up link is the most linkely problem.
You can see if the errors increment on the dial-up interface during these periods with
Code:
watch -n 3 ip -s link show <dial-up interface>
(Note if the errors are mostly received packets at the remote end, you won't see any errors in above)
 
1 members found this post helpful.
Old 07-10-2016, 09:57 PM   #6
frankbell
LQ Guru
 
Registered: Jan 2006
Location: Virginia, USA
Distribution: Slackware, Ubuntu MATE, Mageia, and whatever VMs I happen to be playing with
Posts: 19,237
Blog Entries: 28

Rep: Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116Reputation: 6116
The easiest thing to do and the first thing you should do is swap out the ethernet cable for a known good one. If the cable is the culprit, no amount of netstating or pinging or tracerouting you do will help you. Hardware does wear out.
 
1 members found this post helpful.
Old 08-05-2016, 09:59 AM   #7
rblampain
Senior Member
 
Registered: Aug 2004
Location: Western Australia
Distribution: Debian 11
Posts: 1,288

Original Poster
Rep: Reputation: 52
I have not replaced the cable yet, I will try that in the next few days with a new one, however, I doubt that is the cause of the problem since 2 machines connected to the modem (one with its own new cable) are out of the Internet or have access to the internet at the same time. The telephone also died and the telco reluctantly investigated after telling me that "no outage had been reported" for my area and wanting to terminate the call. A technician came the following day and explained that someone up the street had dug the cables and damaged them and reparations were being carried out. After explaining to him that I still had intermittent access to the Internet (I was told through radio signals) he assured me that normal operation would resume for both phone and Internet at the completion of the repairs. The phone is now working but the internet connection is still intermittent, sometimes lasting only enough time to connect to Google then freezing.

I searched info about the red light mentioned above (it is the "Internet" led) and Netgear (the manufacturer of the modem) has this to say:

Quote:
Internet LED Is Red
If the Internet LED is red, the device was unable to connect to the Internet. Verify the
following:
• Check that your login credentials are correct, or that the information you entered on the
Basic Settings screen is correct.
• Check with your ISP to verify that the multiplexing method, VPI, and VCI settings on the
ADSL settings screen are correct.
• Check if your ISP has a problem—it might not be that the modem router cannot connect
to the Internet but , rahter that your ISP that cannot provide an Internet connection.
Since point 1 and 2 are not applicable (Internet working intermittently) only point 3 seems to be the cause and I suspect I have ground to make a complaint to the ISP (lodge a "ticket") which I will do if no improvement after testing with a new cable.

Any further comment welcome.
 
Old 08-05-2016, 10:51 PM   #8
frankbell
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It definitely sounds as if the problem is not on your end.
 
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Old 08-06-2016, 01:25 AM   #9
jnihil
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Quote:
the telco reluctantly investigated after telling me that "no outage had been reported" for my area and wanting to terminate the call.
Pretty standard practice for telcos.
Don't let them get away with it.
 
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Old 09-10-2016, 06:00 AM   #10
rblampain
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The phone broke down for the second time in 2 or 3 months or so (no dial tone), the first time a telco technician said somebody had "dug up a cable up the street" but that was then fixed and the phone should be back, it was but the Internet connection was just as bad. The second time, another telco technician said a cable had been replaced but had been incorrectly wired but the mistake was just corrected and the phone should be back which it was but since, the Internet connection has been rock solid which seems to indicate that the faulty Internet connection was due to the telco (competitionless Telstra in .au) although the first technician was of the opinion that the Internet was "radio" and should not have been affected by the damaged cable. Perhaps it was different cables in both breakdowns.
Problem fixed.
 
  


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