Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1758/Kohlers1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6919-Kohlers1.ps) >>/Users/jc/w/tmp/Tune-6919-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1758/Kohlers1.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_69195.log 325685 Log file, useful mostly for debugging
Tune-6919-Kohlers1.abc 145 ABC music file with the extracted tune(s)
Tune-6919-Kohlers1.ps 6 PostScript
Tune-6919-Kohlers1.txt 145 Plain-text file with the extracted tune(s)
Tune-6919-get.log 6809 Log file, useful mostly for debugging
Tune-69190-get.log 1383 Log file, useful mostly for debugging
Tune-69193-10041_Auld_Lang_Syne.abc 1237 ABC music file with the extracted tune(s)
Tune-69193-10041_Auld_Lang_Syne.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-69193-10041_Auld_Lang_Syne.ps 38191 PostScript
Tune-69193-10041_Auld_Lang_Syne.txt 1237 Plain-text file with the extracted tune(s)
Tune-69193-get.log 5674 Log file, useful mostly for debugging
These files should be available for 24 hours.