Your comments

I had the same problem. It seems that the mycollab.bat script file refers server.port to the MYCOLLAB_PORT environment variable that is not defined in windows environment.

If you edit the script file and change the line

%_EXECJAVA% -jar executor.jar %* %MYCOLLAB_OPTS% -Dserver.port=%MYCOLLAB_PORT%


%_EXECJAVA% -jar executor.jar %* %MYCOLLAB_OPTS%

the var in file will be used.

I hope it helps