[FarzinD]

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:

for (i=0; i<dim; i++)
    P_POS(p)[i] -= 0.5*P_DIAM(p)*normal[i];

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.