colvar keyword ForceNoPBC

From: Nadeem A. Vellore (vnadeem_at_gmail.com)
Date: Wed Feb 27 2013 - 23:46:09 CST

Dear All,

I tried using the keyword 'forcenopbc on' and got an error :
colvars: Error: keyword "forcenopbc" is not supported, or not recognized in
this context. colvars: If this error message is unclear, try recompiling
with -DCOLVARS_DEBUG. FATAL ERROR: Error in the collective variables
module: exiting.

is this error due to compilation or mistake in the input command :
Appreciate your reply.

Nadee

------------------------------------------
colvarsTrajFrequency 1000
colvarsRestartFrequency 4000

colvar {
 name COMDistance
 forceNoPBC on
 outputSystemForce yes
 distance
 {
   group1
    {
        atomnumbers 34 36 38 40 44
.
.

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