When you use the "-checkers-activation-file" option in Polyspace Bug Finder, defect checkers are not enabled by default. Only those defect and coding rule checkers that you explicitly set to "on" in your activation XML file will be checked during analysis. If your activation file is empty or doesn’t activate any defect checkers, the analysis will not report violations, even if there are issues in your code.
This behavior is different from using "-checkers-selection-file", which always enables the default set of defect checkers in addition to any additional coding rule checkers you specify. That is why you observed violations before, but now you get none.
Please refer to the documentation page for Checkers activation file for more details: https://www.mathworks.com/help/bugfinder/ref/checkersactivationfilecheckersactivationfile.html#mw_f199bdee-e84e-49f1-9451-84e32f3f37df
I hope this resolves your query!
