pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-93968-learnW.ps) >>/Users/jc/w/tmp/Tune-93968-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Contra/learnW.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-93968-get.log 62036 Log file, useful mostly for debugging
Tune-93968-learnW.abc 11828 ABC music file with the extracted tune(s)
Tune-93968-learnW.ps 129882 PostScript
Tune-93968-learnW.txt 11828 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.