Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1769/MichaelDabney_12Minuets12Dances-1760-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8526-MichaelDabney_12Minuets12Dances-1760-V1.ps) >>/Users/jc/w/tmp/Tune-8526-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1769/MichaelDabney_12Minuets12Dances-1760-V1.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-8526-MichaelDabney_12Minuets12Dances-1760-V1.abc 176 ABC music file with the extracted tune(s)
Tune-8526-MichaelDabney_12Minuets12Dances-1760-V1.ps 6 PostScript
Tune-8526-MichaelDabney_12Minuets12Dances-1760-V1.txt 176 Plain-text file with the extracted tune(s)
Tune-8526-get.log 8127 Log file, useful mostly for debugging
Tune-85260-get.log 4347 Log file, useful mostly for debugging
Tune-85266-24CountryDances_1779_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-85266-24CountryDances_1779_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-85266-get.log 3528 Log file, useful mostly for debugging
Tune-85268-get.log 4672 Log file, useful mostly for debugging
These files should be available for 24 hours.