pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8555-MusiciansCompanionP3-1844-V2.ps) >>/Users/jc/w/tmp/Tune-8555-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/MusiciansCompanionP3-1844-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_85551.log 250099 Log file, useful mostly for debugging
Form_85550.log 792 Log file, useful mostly for debugging
Tune-8555-MusiciansCompanionP3-1844-V2.abc 628 ABC music file with the extracted tune(s)
Tune-8555-MusiciansCompanionP3-1844-V2.ps 35159 PostScript
Tune-8555-MusiciansCompanionP3-1844-V2.txt 628 Plain-text file with the extracted tune(s)
Tune-8555-get.log 4824 Log file, useful mostly for debugging
Tune-85550-get.log 8378 Log file, useful mostly for debugging
Tune-85554-get.log 8407 Log file, useful mostly for debugging
Tune-85555-get.log 3726976 Log file, useful mostly for debugging
Tune-85558-get.log 2933 Log file, useful mostly for debugging
Tune-85559-get.log 1405 Log file, useful mostly for debugging
These files should be available for 24 hours.