pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-25949-ofpc_volume1.ps) >>/Users/jc/w/tmp/Tune-25949-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/OFPC/ofpc_volume1.txt

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-25949-get.log 31194 Log file, useful mostly for debugging
Tune-25949-ofpc_volume1.abc 591 ABC music file with the extracted tune(s)
Tune-25949-ofpc_volume1.ps 41238 PostScript
Tune-25949-ofpc_volume1.txt 591 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.