pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9130-Gentleman.ps) >>/Users/jc/w/tmp/Tune-9130-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/Gentleman.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
Coll_91307.log 136152 Log file, useful mostly for debugging
Form_91301.log 825 Log file, useful mostly for debugging
Form_91305.log 840 Log file, useful mostly for debugging
Tune-9130-Gentleman.abc 690 ABC music file with the extracted tune(s)
Tune-9130-Gentleman.ps 37463 PostScript
Tune-9130-Gentleman.txt 690 Plain-text file with the extracted tune(s)
Tune-9130-get.log 12548 Log file, useful mostly for debugging
Tune-91302-get.log 4772 Log file, useful mostly for debugging
Tune-91303-BL.abc 0 ABC music file with the extracted tune(s)
Tune-91303-BL.ps 6 PostScript
Tune-91303-BL.txt 0 Plain-text file with the extracted tune(s)
Tune-91303-get.log 5405 Log file, useful mostly for debugging
Tune-91308-get.log 3086 Log file, useful mostly for debugging
These files should be available for 24 hours.