puts "================"
puts "0031825: Data Exchange, STEP - NULL dereference while re-exporting model with empty Datum description"
puts "================"
puts ""

pload OCAF
param write.step.schema AP242DIS
Close D_First D_Sec -silent

# Read file
set Path ${imagedir}/${casename}.stp
ReadStep D_First [locate_data_file bug26689_nist_ctc_04_asme1_ap242.stp]
set baseDGTDump [XDumpNbDGTs D_First f]

WriteStep D_First $Path
ReadStep D_Sec $Path
file delete $Path
set newDGTDump [XDumpNbDGTs D_Sec f]
XGetOneShape res D_Sec

# Checking
checkshape res
checknbshapes res -face 518 -wire 623 -compound 1

set isOK 1
set nb_ref [llength $newDGTDump]
for { set i 0 } { $i < $nb_ref } { incr i } {
  set refstr [lindex $baseDGTDump $i]
  set curstr [lindex $newDGTDump $i]
  if {[string equal $refstr $curstr] == 0} {
    set isOK 0
  }
}
if {$isOK == 0} {
  puts "Error: wrong export DGT and PMI"
}

# set default parameter
param write.step.schema AP214IS