pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60257-CSRHW-abc1.ps) >>/Users/jc/w/tmp/Tune-60257-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CSRHW-abc1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_60257.log 984 Log file, useful mostly for debugging
Tune-60257-CSRHW-abc1.abc 143246 ABC music file with the extracted tune(s)
Tune-60257-CSRHW-abc1.ps 1359311 PostScript
Tune-60257-CSRHW-abc1.txt 143246 Plain-text file with the extracted tune(s)
Tune-60257-get.log 86178 Log file, useful mostly for debugging
These files should be available for 24 hours.