Thanks for pointing out to right information. It would be great see if solution should allow to rename without any hurdles or renaming function should be excluded in future.

sure.

Custom doesn't mean seeded "Custom" folder present, I created new folder under "Custom" directory and created all report under new folder which I created. Later I renamed the new folder which I created and it caused the above error. Isn't something where we can restart BI publisher or cache clear to point out to new folder?