uV2 Command Line switches

Using the uV2 command line switches to build several projects, it constantly opens the full UI of uV2.

Can this be avoided and simply output compilation/linking text to the console?

Also, are there any documention on the ERRORLEVEL values returned from an invocation of uV2, to allow exiting of a batch of builds when an error occurs?

Finally, can the 'run user program' after build be prevented when an error occurs during the build?

TIA

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