Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1801/cresc.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6313-cresc.ps) >>/Users/jc/w/tmp/Tune-6313-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1801/cresc.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-6313-cresc.abc 142 ABC music file with the extracted tune(s)
Tune-6313-cresc.ps 6 PostScript
Tune-6313-cresc.txt 142 Plain-text file with the extracted tune(s)
Tune-6313-get.log 3959 Log file, useful mostly for debugging
Tune-63132-get.log 4244 Log file, useful mostly for debugging
Tune-63133-get.log 5819 Log file, useful mostly for debugging
Tune-63134-24CountryDances_1802_Thompson.abc 165 ABC music file with the extracted tune(s)
Tune-63134-24CountryDances_1802_Thompson.pdf 2217 Portable Data Format
Tune-63134-24CountryDances_1802_Thompson.ps 6 PostScript
Tune-63134-24CountryDances_1802_Thompson.txt 165 Plain-text file with the extracted tune(s)
Tune-63134-get.log 5431 Log file, useful mostly for debugging
Tune-63137-get.log 5839 Log file, useful mostly for debugging
Tune-63139-JamesJohnson_ScotsMusicalMuseumV5-V1.abc 173 ABC music file with the extracted tune(s)
Tune-63139-JamesJohnson_ScotsMusicalMuseumV5-V1.txt 173 Plain-text file with the extracted tune(s)
Tune-63139-get.log 3652 Log file, useful mostly for debugging
These files should be available for 24 hours.