error while running config file

From: Asmita Gupta (asmita4des_at_gmail.com)
Date: Thu Apr 22 2010 - 13:41:29 CDT

when i am trying to run my namd config file using the command:-

 namd2 null.namd >! null1.log

i am getting the following error:-

Reason: FATAL ERROR: Simulation config file is not accessible.

Charm++ fatal error:
FATAL ERROR: Simulation config file is not accessible.

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