Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM2/Urbani_Liston_1800.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7054-Urbani_Liston_1800.ps) >>/Users/jc/w/tmp/Tune-7054-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM2/Urbani_Liston_1800.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-7054-Urbani_Liston_1800.abc 154 ABC music file with the extracted tune(s)
Tune-7054-Urbani_Liston_1800.ps 6 PostScript
Tune-7054-Urbani_Liston_1800.txt 154 Plain-text file with the extracted tune(s)
Tune-7054-get.log 4228 Log file, useful mostly for debugging
Tune-70540-EliasHowe_MusiciansCompanionP1-1842-V2.abc 174 ABC music file with the extracted tune(s)
Tune-70540-EliasHowe_MusiciansCompanionP1-1842-V2.ps 6 PostScript
Tune-70540-EliasHowe_MusiciansCompanionP1-1842-V2.txt 174 Plain-text file with the extracted tune(s)
Tune-70540-get.log 4577 Log file, useful mostly for debugging
Tune-70542-ERM-V2.abc 143 ABC music file with the extracted tune(s)
Tune-70542-ERM-V2.ps 6 PostScript
Tune-70542-ERM-V2.txt 143 Plain-text file with the extracted tune(s)
Tune-70542-get.log 4032 Log file, useful mostly for debugging
Tune-70549-JohnTreat_GftF2.abc 152 ABC music file with the extracted tune(s)
Tune-70549-JohnTreat_GftF2.ps 6 PostScript
Tune-70549-JohnTreat_GftF2.txt 152 Plain-text file with the extracted tune(s)
Tune-70549-get.log 4215 Log file, useful mostly for debugging
These files should be available for 24 hours.