pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4678-_Thompsons_V2_1758-1765_FTM.ps) >>/Users/jc/w/tmp/Tune-4678-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Thompson/_Thompsons_V2_1758-1765_FTM.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_46787.log 67154 Log file, useful mostly for debugging
Tune-4678-_Thompsons_V2_1758-1765_FTM.abc 479 ABC music file with the extracted tune(s)
Tune-4678-_Thompsons_V2_1758-1765_FTM.ps 34225 PostScript
Tune-4678-_Thompsons_V2_1758-1765_FTM.txt 479 Plain-text file with the extracted tune(s)
Tune-4678-get.log 4665 Log file, useful mostly for debugging
These files should be available for 24 hours.