"! Prolog ran out of space during execution"
"! Invalid file specification"
"! Attempt to open more then ".itos(maxfiles+1)." files"
"! ".failuremessage(flag)
"! File ".filestrng." does not exist"
"! Restore fails -".failuremessage(flag)
"** File ".sfile." is not a saved Prolog state"
"** File ".sfile." is not compatible with this Prolog version"
"! Input ended"
"! Output exceeded"
""
"! First argument of instance must be a reference"