pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-98406-10792_Welch_Harper.ps) >>/Users/jc/w/tmp/Tune-98406-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/10792_Welch_Harper.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_98406.log 261010 Log file, useful mostly for debugging
Form_98406.log 1991 Log file, useful mostly for debugging
Tune-98406-10792_Welch_Harper.abc 635 ABC music file with the extracted tune(s)
Tune-98406-10792_Welch_Harper.ps 35343 PostScript
Tune-98406-10792_Welch_Harper.txt 635 Plain-text file with the extracted tune(s)
Tune-98406-get.log 4552 Log file, useful mostly for debugging
These files should be available for 24 hours.