From: Subrata Paul (paul.subrata34_at_gmail.com)
Date: Mon Mar 30 2015 - 00:26:54 CDT

Dear NAMD/VMD user,

I am calculating nonbonded energy from amber topology file usind VMD
NAMDenergy plugin.
The following error are coming

------------- Processor 0 Exiting: Called CmiAbort ------------
Reason: FATAL ERROR: The periodicity of dihedral # 1 is zero!

Charm++ fatal error:
FATAL ERROR: The periodicity of dihedral # 1 is zero!

------------- Processor 0 Exiting: Called CmiAbort ------------
Reason: FATAL ERROR: The periodicity of dihedral # 1 is zero!

Charm++ fatal error:
FATAL ERROR: The periodicity of dihedral # 1 is zero!

    while executing
"exec $namdcmd ${jobname}-temp.namd > ${jobname}-temp.${i}.log"
    (procedure "namdrun" line 75)
    invoked from within
"namdrun"
    (procedure "namdmain" line 76)
    invoked from within
"namdmain"
    (in namespace inscope "::namdEnergy" script line 19)
    invoked from within
"::namespace inscope ::namdEnergy {
      mol top $currentMol
      variable sel1
      variable sel2
      variable nsel
      set energy ""
      set..."
    invoked from within
".namdenergy.gobutton invoke"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 [list $w invoke]"
    (procedure "tk::ButtonUp" line 22)
    invoked from within
"tk::ButtonUp .namdenergy.gobutton"
    (command bound to event)

Can you suggest me why..?

-- 
*With Best RegardsSubrata PaulPhD StudentDept of Chemistry.IIT Guwahati*