Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/was/IaST-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3464-IaST-abc1.ps) >>/Users/jc/w/tmp/Tune-3464-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/was/IaST-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_34641.log 822 Log file, useful mostly for debugging
Form_34648.log 823 Log file, useful mostly for debugging
Tune-3464-IaST-abc1.abc 145 ABC music file with the extracted tune(s)
Tune-3464-IaST-abc1.ps 6 PostScript
Tune-3464-IaST-abc1.txt 145 Plain-text file with the extracted tune(s)
Tune-3464-get.log 4033 Log file, useful mostly for debugging
Tune-34641-get.log 5913 Log file, useful mostly for debugging
Tune-34642-get.log 1507 Log file, useful mostly for debugging
Tune-34647-get.log 5274 Log file, useful mostly for debugging
Tune-34648-get.log 6401 Log file, useful mostly for debugging
These files should be available for 24 hours.