SES Build Fails - main.o has been supplied more than once

Question

I can't find anything on this error on Nordic support or Segger support sites. I've looked into the obj directory and only find one main.o file (of course!). Can't see anything in the project file that would cause this problem. 
 
 Also, is there a limit on the number of warnings that can occur before the build will fail? I can't find a project setting for this. My code generates 24 warnings.

tesc · Accepted Answer

Hi, The "modified options" tag means options for the particular file override options for the project or solution. There is a hierarchy of options, one for the solution, then one for each project, then one for each file. You can navigate between those levels using the up/down arrows top left of the options window. Changing a value at a lower level in the hierarchy overrides the values provided at a higher level in the hierarchy. If you have overridden a value for a specific file or project, but want to go back to the default settings from higher up, you can right click on the setting and select "Use Inherited Value". I found two instances of the file path to ../../../main.c in the project file. (Because it is an xml file you can open the emProject file directly in a text editor.) I removed the extra copy. Can you see if that fixed it? (I stored it as txt, since emProject file ending was not accepted. As a side effect I think you can see it in full text here in DevZone as well, as txt is a known text format.) Fullscreen PerfShwr-ProjectFile.txt Download Regards, Terje

EricDelangis · Answer

Turns out that there were two rogue instances of <main.c> in the project file. After deleting both of them, the error went away. Thanks for the tip about modifying the options tree. That knowledge helps a lot.

SES Build Fails - main.o has been supplied more than once

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