X:1 not found in http://www.math.mun.ca/~bshawyer/straths/BluebellsOfScotland.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-54939-BluebellsOfScotland.ps) >>/Users/jc/w/tmp/Tune-54939-get.log 2>&1" returned status 256
http://www.math.mun.ca/~bshawyer/straths/BluebellsOfScotland.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Form_54939.log 1835 Log file, useful mostly for debugging
Tune-54939-BluebellsOfScotland.abc 0 ABC music file with the extracted tune(s)
Tune-54939-BluebellsOfScotland.ps 6 PostScript
Tune-54939-BluebellsOfScotland.txt 0 Plain-text file with the extracted tune(s)
Tune-54939-get.log 4616 Log file, useful mostly for debugging
These files should be available for 24 hours.