pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-53856-CR52.ps) >>/Users/jc/w/tmp/Tune-53856-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/contra/CR52.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_53856.log 271685 Log file, useful mostly for debugging
Tune-53856-CR52.abc 1854 ABC music file with the extracted tune(s)
Tune-53856-CR52.ps 44332 PostScript
Tune-53856-CR52.txt 1854 Plain-text file with the extracted tune(s)
Tune-53856-get.log 4259 Log file, useful mostly for debugging
These files should be available for 24 hours.