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This was back in Oct 2020, it is now Sep 2021.....I am getting this issue with my Steam game on my Win7 PC. I click on the icon for building and all I get is a constant idselectcat popup...I cannot bulid ANYTHING AT ALL....is there a fix here?/???????
 
Different patch, developer, hardware and OS - please make your own new thread in future, thanks!


What I'd suggest is a full clean reinstall of the game:

- move any valued save games elsewhere; they are under
C:\Users\{UserName}\AppData\Roaming\Surviving Mars\{large number}\
- "uninstall" in Steam-Surviving Mars
- unsubscribe from ALL mods in the Steam Workshop for this game
- manually delete both the Steam/SteamApps/common/Surviving Mars AND C:\Users\{Username}\AppData\Roaming\Surviving Mars\ folders
- re-install game in Steam, run a Steam Verify when done.
- add MarsSteam.exe to the exceptions list/whitelist of your antivirus app
- start the game with no mods active and test with a new colony, NOT any existing one

In particular you need to make sure there are no files or folders left under either the Steam SM or AppData SM locations, before installing again.



IF that doesn't help Please attach here the latest (ONLY!) game log file, from here:
C:\Users\{Username}\AppData\Roaming\Surviving Mars\logs\
To see the AppData folder you'll need to enable View Hidden Items in File Explorer.

Plus, DXDIAG is a program you run from the Windows search box on the task bar. After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.