Latest LQ Deal: Complete CCNA, CCNP & Red Hat Certification Training Bundle
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 02-28-2012, 06:31 AM   #1
LQ Newbie
Registered: Feb 2012
Posts: 1

Rep: Reputation: Disabled
symbol lookup error: undefined symbol , upon calling C++ executable from matlab

Although I faced this problem while using Matlab, I feel this is more an issue with linux:

Upon giving the following command from Matlab command prompt, I get this error:

>>[status, result] = system('./testGEA outDataTest1.txt')

status =


result =

./testGEA: symbol lookup error: /home/swagatika/softwares/qvision.0.8.0/lib/ undefined symbol: _ZN12QApplication10commitDataER15QSessionManager

testGEA is an executable file compiled using Qvision library (link :

I can successfully execute the command from Linux(ubuntu 10.10) terminal, but calling from Matlab fails.

I searched on internet and got to know that I am supposed to apply some commands and here is it:
ldd gives the following:

~/softwares/qvision.0.8.0/lib$ ldd => (0x00363000) => /usr/lib/ (0x007b6000) => /usr/lib/ (0x001d0000) => /usr/lib/ (0x005cf000) => /usr/lib/ (0x00a0a000) => /usr/lib/ (0x00fa4000) => /usr/lib/ (0x061b1000) => /usr/lib/ (0x00110000) => /usr/lib/mesa/ (0x00203000) => /lib/ (0x00180000) => /usr/lib/ (0x00c38000) => /lib/ (0x0019a000) => /lib/ (0x00256000) => /lib/ (0x00612000) => /usr/lib/ (0x00272000) => /lib/ (0x001c0000) => /usr/lib/ (0x00af6000) => /usr/lib/ (0x00364000) => /usr/lib/ (0x004c0000) => /usr/lib/ (0x002e9000) => /usr/lib/ (0x00319000) => /lib/ (0x00b00000) => /lib/ (0x00330000) => /lib/ (0x00481000) => /usr/lib/ (0x0053b000) => /usr/lib/ (0x001c4000) => /usr/lib/ (0x0057e000) => /usr/lib/ (0x00597000) => /usr/lib/ (0x00355000) => /lib/ (0x0035a000) => /usr/lib/ (0x00496000) => /usr/lib/ (0x0049a000) => /usr/lib/ (0x005a7000) => /lib/ (0x005ad000)
/lib/ (0x004a2000) => /usr/lib/ (0x0076f000) => /lib/ (0x00789000) => /usr/lib/ (0x009a3000) => /usr/lib/ (0x005b7000) => /lib/ (0x00bcf000) => /lib/ (0x005bb000) => /usr/lib/ (0x005c0000)

I also used nm which gives U which means that the symbol is undefined.

$ nm -D /home/swagatika/softwares/qvision.0.8.0/lib/ | grep _ZN12QApplication10commitDataER15QSessionManager
U _ZN12QApplication10commitDataER15QSessionManager

I do not have much knowledge about the linux commands, so please give suggestions with details if possible...



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
[SOLVED] symbol lookup error: /usr/sbin/httpd: undefined symbol: apr_file_link bagi Slackware 3 05-17-2011 07:49 AM
symbol lookup error: /usr/lib/ undefined symbol: av_crc04C11DB7 priceey Linux - Software 0 05-06-2009 08:14 AM
./firefox-bin :symbol lookup error:/lib/ undefined symbol: arulupsaras Linux - General 1 11-08-2008 04:48 AM
symbol lookup error: /usr/lib/ undefined symbol:... IamI Slackware 17 02-29-2008 11:10 AM
Workaround: 'symbol lookup error: k3b: undefined symbol: lstat64' devdol Linux - Software 2 02-15-2008 03:36 AM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 03:05 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration