Strange MOVE_CAST_ERROR dumps

Hi,

I am getting a strange MOVE_CAST_ERROR dump, (Class: CL_FDT_CASE Method:GENERATE_CONVERT_RESULT, Line 12  "lo_when_result_expr ?= lo_instance."), when I try to execute my ABAP code with the BRF application is closed. However the same program with the same inputs works fine and returns the correct answers as expected if I just have my BRF application open. Does anyone know why this happens?

Thanks,

Saravanan