Using arbitrary samples for Point Source in Acoustic Module

Hello all,

I would like to use arbitrary samples for the Point Source in Acoustic Module. To do this, I used used-define type for the Point Source and tried to load the samples from the table (f). COMSOL error is as follows,

Undefined variable. - Variable: f - Geometry: geom1 - Point: 33 Failed to evaluate Jacobian of expression. - Expression: dvol_spatial((((4pi)comp1.actd.mls1.S)comp1.actd.delta)(1/comp1.actd.rho_c)) Failed to evaluate Jacobian of expression. - Expression: (4picomp1.actd.mls1.Stest(comp1.p)comp1.actd.delta/comp1.actd.rho_c)(dvol_spatial)

Thanks,