Problem with Boundary UDF for DPM - Updating particle position
 

Hello everyone,
I wrote a UDF with Define Macro "DEFINE_DPM_BC". At the end of this function I want to alter particle position with this code:
The problem is it seems that the position is not updated; because including these lines in the function makes no difference in results.
Is there something that I didn't consider?
Any suggestion might help.

Thanks,
Farzin.