IBM Cognos 10 Bug? with mod function

IBM Cognos 10 Bug? with mod function

          For mod function , syntax look like this mod (20,3) >> the result should be 2. But if you got some error please try to use ; instead of ,

          I loss my time 2 days for solve this issue. Amazing.

mod (10,2) >> error

Change to mod (10;2) >> No errors !!!