colvars fatal error

From: Leili Zhang (
Date: Tue Nov 04 2014 - 22:44:05 CST

Dear all:

I recently compiled NAMD-2.10b1 for Linux-x86_64-MPI. I ran normal MD
simulations perfectly fine with 16-128 cores of CPU. However when I tried
to start metadynamics simulations, I got the following error messages:

colvars: Collective variables biases initialized, 1 in total.
colvars: Collective variables module initialized.
Info: Startup phase 10 took 0.015816 s, 381.293 MB of memory in use
Info: Startup phase 11 took 0.000250816 s, 381.293 MB of memory in use
Info: useSync: 1 useProxySync: 0
Info: Startup phase 12 took 0.000249147 s, 381.293 MB of memory in use
Info: Finished startup at 2.20578 s, 381.293 MB of memory in use

TCL: Running for 10000000 steps
colvars: Error: NAMD does not have yet a way to communicate atom
velocities to the colvars.
colvars: If this error message is unclear, try recompiling with
FATAL ERROR: Error in the collective variables module: exiting.
: Success
[0] Stack Traceback:
  [0:0] _Z8NAMD_errPKc+0xde [0x61345e]
  [0:1] _ZN16colvarproxy_namd11fatal_errorERKSs+0x52 [0xa67232]
  [0:2] _ZN12colvarmodule4atom13read_velocityEv+0x2c [0xa631ac]
  [0:3] _ZN12colvarmodule10atom_group15read_velocitiesEv+0x1fc [0xa2d04c]
  [0:4] _ZN6colvar4calcEv+0x11a [0x9ee14a]
  [0:5] _ZN12colvarmodule4calcEv+0x55 [0x9bff85]
  [0:6] _ZN16colvarproxy_namd9calculateEv+0x5e2 [0xa64be2]
  [0:8] _ZN18GlobalMasterServer11callClientsEv+0xcfc [0x99a48c]
  [0:9] _ZN18GlobalMasterServer8recvDataEP20ComputeGlobalDataMsg+0x67c
  [0:10] _Z15_processHandlerPvP11CkCoreState+0x705 [0xcb5da5]
  [0:11] CsdScheduler+0x47d [0xe15bdd]
  [0:12] _ZN9ScriptTcl7Tcl_runEPvP10Tcl_InterpiPPc+0x2c5 [0xba44d5]
  [0:13] TclInvokeStringCommand+0x88 [0xe712a8]
  [0:14] [0xe73ec7]
  [0:15] [0xe752e2]
  [0:16] Tcl_EvalEx+0x16 [0xe75b06]
  [0:17] Tcl_FSEvalFileEx+0x151 [0xed7cb1]
  [0:18] Tcl_EvalFile+0x2e [0xed7e6e]
  [0:19] _ZN9ScriptTcl4loadEPc+0xf [0xba126f]
  [0:20] main+0x3e7 [0x617ac7]
  [0:21] __libc_start_main+0xfd [0x300081ecdd]
  [0:22] [0x57ccf9]

The input files worked also fine with NAMD-2.9 on, say, gordon cluster or
stampede. Unfortunately I cannot successfully compile NAMD-2.9 on our
current cluster after several tries. So I cannot say..

Thanks in advance for any advices!


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