pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71913-sessionTunes.ps) >>/Users/jc/w/tmp/Tune-71913-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/ipsi.fraunhofer.de/oasys/misc/music/sessionTunes.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
Find_71913.log 1597 Log file, useful mostly for debugging
Tune-71913-get.log 4776 Log file, useful mostly for debugging
Tune-71913-sessionTunes.abc 262 ABC music file with the extracted tune(s)
Tune-71913-sessionTunes.ps 35474 PostScript
Tune-71913-sessionTunes.txt 262 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.