pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-32176-2302_Ceann_Dubh_Dileas.ps) >>/Users/jc/w/tmp/Tune-32176-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/2302_Ceann_Dubh_Dileas.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_32176.log 284330 Log file, useful mostly for debugging
Tune-32176-2302_Ceann_Dubh_Dileas.abc 1266 ABC music file with the extracted tune(s)
Tune-32176-2302_Ceann_Dubh_Dileas.ps 44365 PostScript
Tune-32176-2302_Ceann_Dubh_Dileas.txt 1266 Plain-text file with the extracted tune(s)
Tune-32176-get.log 4682 Log file, useful mostly for debugging
These files should be available for 24 hours.