pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8290-cresc.ps) >>/Users/jc/w/tmp/Tune-8290-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/dfty/cresc.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_82902.log 1016690 Log file, useful mostly for debugging
Coll_82903.log 292760 Log file, useful mostly for debugging
Coll_82908.log 280115 Log file, useful mostly for debugging
Tune-8290-cresc.abc 36 ABC music file with the extracted tune(s)
Tune-8290-cresc.ps 6 PostScript
Tune-8290-cresc.txt 36 Plain-text file with the extracted tune(s)
Tune-8290-get.log 8946 Log file, useful mostly for debugging
Tune-82909-493_Speed_the_Plough.abc 923 ABC music file with the extracted tune(s)
Tune-82909-493_Speed_the_Plough.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-82909-493_Speed_the_Plough.ps 38374 PostScript
Tune-82909-493_Speed_the_Plough.txt 923 Plain-text file with the extracted tune(s)
Tune-82909-get.log 5511 Log file, useful mostly for debugging
These files should be available for 24 hours.