Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1791/IaST-abc1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4344-IaST-abc1.ps) >>/Users/jc/w/tmp/Tune-4344-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1791/IaST-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
Coll_43447.log 142894 Log file, useful mostly for debugging
Form_43441.log 929 Log file, useful mostly for debugging
Tune-4344-IaST-abc1.abc 146 ABC music file with the extracted tune(s)
Tune-4344-IaST-abc1.ps 6 PostScript
Tune-4344-IaST-abc1.txt 146 Plain-text file with the extracted tune(s)
Tune-4344-get.log 4041 Log file, useful mostly for debugging
Tune-43442-get.log 4139 Log file, useful mostly for debugging
Tune-43444-24CountryDances_1798_Bland_Weller.abc 176 ABC music file with the extracted tune(s)
Tune-43444-24CountryDances_1798_Bland_Weller.pdf 2217 Portable Data Format
Tune-43444-24CountryDances_1798_Bland_Weller.ps 6 PostScript
Tune-43444-24CountryDances_1798_Bland_Weller.txt 176 Plain-text file with the extracted tune(s)
Tune-43444-get.log 5585 Log file, useful mostly for debugging
Tune-43449-get.log 4192 Log file, useful mostly for debugging
These files should be available for 24 hours.