pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8897-MusiciansCompanionP2-1843-V2.ps) >>/Users/jc/w/tmp/Tune-8897-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2-1843-V2.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_88975.log 141597 Log file, useful mostly for debugging
Form_88971.log 1626 Log file, useful mostly for debugging
Form_88976.log 841 Log file, useful mostly for debugging
Tune-8897-MusiciansCompanionP2-1843-V2.abc 539 ABC music file with the extracted tune(s)
Tune-8897-MusiciansCompanionP2-1843-V2.ps 34762 PostScript
Tune-8897-MusiciansCompanionP2-1843-V2.txt 539 Plain-text file with the extracted tune(s)
Tune-8897-get.log 4712 Log file, useful mostly for debugging
Tune-88973-get.log 4424 Log file, useful mostly for debugging
Tune-88979-get.log 3611159 Log file, useful mostly for debugging
These files should be available for 24 hours.