pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68393-ZemerLach.ps) >>/Users/jc/w/tmp/Tune-68393-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/israel/ZemerLach.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-68393-ZemerLach.abc 927 ABC music file with the extracted tune(s)
Tune-68393-ZemerLach.ps 39136 PostScript
Tune-68393-ZemerLach.txt 927 Plain-text file with the extracted tune(s)
Tune-68393-get.log 5213 Log file, useful mostly for debugging
These files should be available for 24 hours.