FATAL ERROR: unknown floating-point error, errno = 4

From: Manori Indira Jayasinghe (manori_at_physics.uc.edu)
Date: Thu Dec 22 2005 - 23:16:41 CST

Dear Chris,

My abf code ran for 32480 and then stopped giving a "FATAL ERROR: unknown
floating-point error, errno = 4". I used parallel computing waith 4 nodes
and I have no idea what this error is.Please help me. I paste part of my
log file here and attached the abf script. Thank you very much.

TCL: ABF> Xi at timestep 32480 : 10.7473772938
TCL: ABF> Data written to output files at timestep 32480
TCL: unknown floating-point error, errno = 4
FATAL ERROR: unknown floating-point error, errno = 4
    while executing
"expr [lindex $coords($g2) 2] - [lindex $coords($g1) 2"
    (in namespace eval "::ABF::ABFcoord" script line 5)
    invoked from within
"namespace eval ABFcoord {

        loadcoords coords

        return [expr [lindex $coords($g2) 2] - [lindex $coords($g1) 2]]
    }"
    (procedure "ABFcoord" line 2)
    invoked from within
"ABFcoord"
    (in namespace eval "::ABF" script line 52)
    invoked from within
"namespace eval ::ABF {

# First timestep : we don't have forces
if { $timestep == 0 } {

        # must not be equal to $timestep - 1
        set timeStored -2
    ..."
    (procedure "calcforces" line 2)
    invoked from within
"calcforces"
Stack Traceback:
  [0] [0x8268a76]
  [1] [0x8048c3d]
  [2] [0x814ff54]
  [3] [0x8144356]
  [4] [0x81480cc]
  [5] [0x8145979]
  [6] [0x8222276]
  [7] [0x82241e9]
  [8] [0x826cf36]
  [9] [0x826d11c]
  [10] [0x826d05a]
  [11] [0x804da4d]
  [12] [0x81bb286]
  [13] [0x8282ec5]
  [14] [0x82b71ea]
  [15] [0x82b78fc]
  [16] [0x82afa63]
  [17] [0x81be469]
  [18] [0x804af96]
  [19] [0x833a2c2]
  [20] [0x8048101]


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