Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1758/HibernianMuse-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8885-HibernianMuse-V1.ps) >>/Users/jc/w/tmp/Tune-8885-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1758/HibernianMuse-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
Coll_88852.log 274497 Log file, useful mostly for debugging
Coll_88853.log 282929 Log file, useful mostly for debugging
Tune-8885-HibernianMuse-V1.abc 153 ABC music file with the extracted tune(s)
Tune-8885-HibernianMuse-V1.ps 6 PostScript
Tune-8885-HibernianMuse-V1.txt 153 Plain-text file with the extracted tune(s)
Tune-8885-get.log 4190 Log file, useful mostly for debugging
Tune-88851-get.log 4282 Log file, useful mostly for debugging
Tune-88852-get.log 1793 Log file, useful mostly for debugging
Tune-88858-Tomas_Haards_Schottis.abc 454 ABC music file with the extracted tune(s)
Tune-88858-Tomas_Haards_Schottis.txt 454 Plain-text file with the extracted tune(s)
Tune-88858-get.log 3465 Log file, useful mostly for debugging
These files should be available for 24 hours.