Hello sir,

I had installed first SUMO 0.25.0 but I have remove using sudo apt-get remove SUMO 0.25.0 in ubuntu 14.04.

Now I have installed SUMO 0.12.3 and it is successfully install when I gave configure command then I got :

Enabled: InternalLanes DoublePrecision Subsecond TRACI GDAL
Disabled: Debug Messages MemoryChecks PROJ GUI UnitTests

After I give command make and sudo make install then it successfully making the directory.

but when I show gui then it show me gui page of SUMO 0.25.0. how can I remove sumo 0.25.0 gui and install sumo 0.12.3 gui?

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I've found that sudo apt-get --purge autoremove <package> works well for deletions (first of all, run dpkg -l sumo* to get a listing of all the sumo-related packages that you have installed).

After any package deletion, you may find that you also have personal configuration files left in a . directory in your home directory - have a look to see if any directory exists there for sumo (you'll need ls -la to list . files and directories) and, if you don't need it, delete it (or rename it if you're unsure). Also check the directories in ~/.local/share and ~/.config. Alternatively, run a case-insensitive find for any folders named "sumo*" under your home directory.

Then, once all is clean, reinstall 0.12.3.