Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/GlendarrochSDS/BostonCollection.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6916-BostonCollection.ps) >>/Users/jc/w/tmp/Tune-6916-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/GlendarrochSDS/BostonCollection.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_69162.log 288545 Log file, useful mostly for debugging
Coll_69163.log 575685 Log file, useful mostly for debugging
Coll_69165.log 289951 Log file, useful mostly for debugging
Coll_69168.log 289950 Log file, useful mostly for debugging
Tune-6916-BostonCollection.abc 163 ABC music file with the extracted tune(s)
Tune-6916-BostonCollection.ps 6 PostScript
Tune-6916-BostonCollection.txt 163 Plain-text file with the extracted tune(s)
Tune-6916-get.log 4252 Log file, useful mostly for debugging
Tune-69165-get.log 5230 Log file, useful mostly for debugging
Tune-69166-get.log 3308 Log file, useful mostly for debugging
Tune-97060-Tune-69166-BostonCollection.abc 179 ABC music file with the extracted tune(s)
Tune-97060-Tune-69166-BostonCollection.ps 6 PostScript
Tune-97060-Tune-69166-BostonCollection.txt 179 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.