Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Tunes/Kohlers.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7469-Kohlers.ps) >>/Users/jc/w/tmp/Tune-7469-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Tunes/Kohlers.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_74698.log 803 Log file, useful mostly for debugging
Tune-7469-CDSS_Gems.abc 148 ABC music file with the extracted tune(s)
Tune-7469-CDSS_Gems.ps 6 PostScript
Tune-7469-CDSS_Gems.txt 148 Plain-text file with the extracted tune(s)
Tune-7469-Kohlers.abc 145 ABC music file with the extracted tune(s)
Tune-7469-Kohlers.ps 6 PostScript
Tune-7469-Kohlers.txt 145 Plain-text file with the extracted tune(s)
Tune-7469-get.log 11941 Log file, useful mostly for debugging
Tune-74690-MoF.abc 140 ABC music file with the extracted tune(s)
Tune-74690-MoF.txt 140 Plain-text file with the extracted tune(s)
Tune-74690-get.log 3056 Log file, useful mostly for debugging
Tune-74691-FARNE_Anonymous1.abc 169 ABC music file with the extracted tune(s)
Tune-74691-FARNE_Anonymous1.ps 6 PostScript
Tune-74691-FARNE_Anonymous1.txt 169 Plain-text file with the extracted tune(s)
Tune-74691-get.log 5697 Log file, useful mostly for debugging
Tune-74695-get.log 32082 Log file, useful mostly for debugging
Tune-74697-IaST-abc1.abc 146 ABC music file with the extracted tune(s)
Tune-74697-IaST-abc1.txt 146 Plain-text file with the extracted tune(s)
Tune-74697-get.log 3164 Log file, useful mostly for debugging
Tune-74698-get.log 4382 Log file, useful mostly for debugging
Tune-74699-get.log 4057 Log file, useful mostly for debugging
These files should be available for 24 hours.