What do the error code values for RunWait() mean?

Question

Documentation for RunWait() lacks description of returned error codes.

What do the different error code values mean?

Answer 1

It is because these codes appear as a result of the programs you run with RunWait, not to this AutoIT function.

Generic success code is zero, and any non-zero value could mean absolutely anything, and the only way to know what happened is to study this exact app or console command output.