Have you updated to Studio 7.4.1? It resolves a problem with Studio not stopping at breakpoints: https://docs.mulesoft.com/release-notes/studio/anypoint-studio-7.4-with-4.2-runtime-update-site-1-release-notes#bug-fixes
I had tried to:
May be someone knows the solution.
Thank you for your help.
Helping each other we make our World better
Have you updated to Studio 7.4.1? It resolves a problem with Studio not stopping at breakpoints: https://docs.mulesoft.com/release-notes/studio/anypoint-studio-7.4-with-4.2-runtime-update-site-1-release-notes#bug-fixes
Thank you very much. You were right. It works after updating.