pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99033-2281.ps) >>/Users/jc/w/tmp/Tune-99033-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/2281=Callam_Brougach_Strathspey.abc2.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_99033.log 455611 Log file, useful mostly for debugging
Tune-99033-2281.abc 2221 ABC music file with the extracted tune(s)
Tune-99033-2281.ps 54602 PostScript
Tune-99033-2281.txt 2221 Plain-text file with the extracted tune(s)
Tune-99033-get.log 5543 Log file, useful mostly for debugging
These files should be available for 24 hours.