Error in StaMPS - step 3 (stamps(3))

Hi
I had this problem with stamps(3):

Matrix dimensions must agree.
Error in ps_select (line 163)
ok_ix=find(percent_rand<max_percent_rand);
Error in stamps (line 356)
ps_select;

I have 55 interferograms, I used the D value 0.4 in mt_prep_snap.

How can solve?
Please help me