Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1777/CaledonianMusicalRepository.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2791-CaledonianMusicalRepository.ps) >>/Users/jc/w/tmp/Tune-2791-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1777/CaledonianMusicalRepository.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_2791.log 913 Log file, useful mostly for debugging
Tune-2791-CaledonianMusicalRepository.abc 164 ABC music file with the extracted tune(s)
Tune-2791-CaledonianMusicalRepository.ps 6 PostScript
Tune-2791-CaledonianMusicalRepository.txt 164 Plain-text file with the extracted tune(s)
Tune-2791-get.log 4421 Log file, useful mostly for debugging
Tune-27910-get.log 4093 Log file, useful mostly for debugging
Tune-27911-WilliamCampbell_10thBook_1798-V2.abc 169 ABC music file with the extracted tune(s)
Tune-27911-WilliamCampbell_10thBook_1798-V2.txt 169 Plain-text file with the extracted tune(s)
Tune-27911-get.log 10852 Log file, useful mostly for debugging
Tune-27912-11521.abc 2816 ABC music file with the extracted tune(s)
Tune-27912-11521.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-27912-11521.ps 56567 PostScript
Tune-27912-11521.txt 2816 Plain-text file with the extracted tune(s)
Tune-27912-get.log 5987 Log file, useful mostly for debugging
Tune-27913-get.log 4033 Log file, useful mostly for debugging
Tune-27915-blank.abc 31 ABC music file with the extracted tune(s)
Tune-27915-blank.ps 6 PostScript
Tune-27915-blank.txt 31 Plain-text file with the extracted tune(s)
Tune-27915-get.log 5520 Log file, useful mostly for debugging
Tune-27918-get.log 4382 Log file, useful mostly for debugging
Tune-27919-get.log 4490 Log file, useful mostly for debugging
These files should be available for 24 hours.