Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1800/Gow-CSR-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6442-Gow-CSR-abc1.ps) >>/Users/jc/w/tmp/Tune-6442-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1800/Gow-CSR-abc1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-6442-Gow-CSR-abc1.abc 149 ABC music file with the extracted tune(s)
Tune-6442-Gow-CSR-abc1.ps 6 PostScript
Tune-6442-Gow-CSR-abc1.txt 149 Plain-text file with the extracted tune(s)
Tune-6442-get.log 9818 Log file, useful mostly for debugging
Tune-64420-Norman_and_Helen_Robson_D-001.svg 32784 Scalable Vector Graphics format
Tune-64420-Norman_and_Helen_Robson_D.abc 730 ABC music file with the extracted tune(s)
Tune-64420-Norman_and_Helen_Robson_D.txt 730 Plain-text file with the extracted tune(s)
Tune-64420-get.log 4493 Log file, useful mostly for debugging
Tune-64425-Button_Whitaker_12ElegantNewDances_1810.abc 182 ABC music file with the extracted tune(s)
Tune-64425-Button_Whitaker_12ElegantNewDances_1810.ps 6 PostScript
Tune-64425-Button_Whitaker_12ElegantNewDances_1810.txt 182 Plain-text file with the extracted tune(s)
Tune-64425-get.log 9313 Log file, useful mostly for debugging
These files should be available for 24 hours.