pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-93513-Collaboration.ps) >>/Users/jc/w/tmp/Tune-93513-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/england/Collaboration.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_93513.log 252016 Log file, useful mostly for debugging
Form_93513.log 1092 Log file, useful mostly for debugging
Tune-93513-Collaboration.abc 1127 ABC music file with the extracted tune(s)
Tune-93513-Collaboration.ps 39751 PostScript
Tune-93513-Collaboration.txt 1127 Plain-text file with the extracted tune(s)
Tune-93513-get.log 4422 Log file, useful mostly for debugging
These files should be available for 24 hours.