[debashis]

Hi all,
I am trying to creat a periodic zone, but hav got the following error :

>grid/modify-zones/make-periodic
Periodic zone [()] 6
Shadow zone [()] 5
Rotational periodic? (if no, translational) [yes] no
Create periodic zones? [yes] yes
Auto detect translation vector? [yes] yes

Warning: differing number of faces on these threads.
computed translation deltas: -0.000436 -0.000421 -0.200000
zone 6: matched 0 out of 500 faces.
zone 5: matched 0 out of 600 faces.

Error: Failed to make zones periodic.
Error Object: #f

can anybody please help me with the msg. I cant understand what it means?