Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book18/CSRHW-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-328-CSRHW-abc2.ps) >>/Users/jc/w/tmp/Tune-328-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book18/CSRHW-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_32808.log 128816 Log file, useful mostly for debugging
Coll_32842.log 133932 Log file, useful mostly for debugging
Coll_32869.log 10539 Log file, useful mostly for debugging
Coll_32899.log 140333 Log file, useful mostly for debugging
Tune-328-CSRHW-abc2.abc 149 ABC music file with the extracted tune(s)
Tune-328-CSRHW-abc2.ps 6 PostScript
Tune-328-CSRHW-abc2.txt 149 Plain-text file with the extracted tune(s)
Tune-328-get.log 4061 Log file, useful mostly for debugging
Tune-32822-get.log 4022 Log file, useful mostly for debugging
Tune-32860-get.log 3564 Log file, useful mostly for debugging
Tune-32882-get.log 4316 Log file, useful mostly for debugging
These files should be available for 24 hours.