question and NAMD operation

From: Patrick Chiu (
Date: Wed Aug 29 2012 - 15:19:36 CDT

Dear Officers:
I have the following error in my NAMD operation:
Reason: FATAL ERROR: Periodic cell has become too small for original patch grid!Possible solutions are to restart from a recent checkpoint,
increase margin, or disable useFlexibleCell for liquid simulation.
My question is how can I prevent this problem?
Your sincerely,
NAMD user
See Hong Chiu

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