Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book45/Gow-CR-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1318-Gow-CR-abc2.ps) >>/Users/jc/w/tmp/Tune-1318-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book45/Gow-CR-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_13188.log 135553 Log file, useful mostly for debugging
Form_13181.log 1031 Log file, useful mostly for debugging
Tune-1318-Gow-CR-abc2.abc 150 ABC music file with the extracted tune(s)
Tune-1318-Gow-CR-abc2.ps 6 PostScript
Tune-1318-Gow-CR-abc2.txt 150 Plain-text file with the extracted tune(s)
Tune-1318-Kerr_MM1-V2.abc 148 ABC music file with the extracted tune(s)
Tune-1318-Kerr_MM1-V2.ps 6 PostScript
Tune-1318-Kerr_MM1-V2.txt 148 Plain-text file with the extracted tune(s)
Tune-1318-get.log 8098 Log file, useful mostly for debugging
Tune-13183-CrossRoad.abc 509 ABC music file with the extracted tune(s)
Tune-13183-CrossRoad.txt 509 Plain-text file with the extracted tune(s)
Tune-13183-get.log 4491 Log file, useful mostly for debugging
Tune-13185-get.log 4926 Log file, useful mostly for debugging
Tune-13185-girl_from_ipanema-001.svg 49310 Scalable Vector Graphics format
Tune-13185-girl_from_ipanema.abc 1420 ABC music file with the extracted tune(s)
Tune-13185-girl_from_ipanema.txt 1420 Plain-text file with the extracted tune(s)
Tune-13186-get.log 3582 Log file, useful mostly for debugging
These files should be available for 24 hours.