Error: atom group "group1" is set, but has no definition

From: Jagan Mohan (o.jagan_at_gmail.com)
Date: Mon Mar 08 2010 - 00:05:08 CST

Dear Users,

I have been trying to setup an ABF calculation for my system but it fails.
My abf script looks like this.

Colvarstrajfrequency 500
Colvarsrestartfrequency 500
colvar {
   name COMDistance
   width 0.1
   lowerboundary 12.0
   upperboundary 32.0
   lowerwallconstant 10.0
   upperwallconstant 10.0
   distance {
      group1 {
       atomnumbers { 4040 4174 4308 4442 4576 4710 4844 4978 5112 5246 5380
5514 5648 5782 5916 6050 6184 6318 6452 6586 6720 6854 6988 7122 7256 7390
7524 7658 7792 7926 9936 10070 10204 10338 10472 10606 10740 10874 11008
11142 11276 11410 11544 11678 }
      }
      group2 {
      psfSegID { O2 }
      }
   }
}
abf {
  colvars COMDistance
  fullSamples 500
}

I get the following error after execution. I think i am missing something
silly here. Could anyone please point it out?

colvars: Initializing a new collective variable.
colvars: # name = COMDistance
colvars: Initializing a new "distance" component.
colvars: # componentCoeff = 1 [default]
colvars: # componentExp = 1 [default]
colvars: # oneSiteSystemForce = off [default]
colvars: Error: atom group "group1" is set, but has no definition.

Thanks and Regards,
Jagan Mohan

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