Thanks for responding Mark.
What do you say about 4 Platform? I actualy published this Business Layer to the reporsitory and created a report to test if i get an error for the dimensions, mapped with columns having custom data data type defined in the back-end.
Gues what! The report executed successfully 
. It would raise an error, i thought, but didn't.
With respect to your workaround, could you please give an example?
Were you referring the use of CONVERT() function in ORA database?
Kind Regards,
Sandeep