Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1800/Stewart_SCAJMR_1784-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1950-Stewart_SCAJMR_1784-V1.ps) >>/Users/jc/w/tmp/Tune-1950-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1800/Stewart_SCAJMR_1784-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_19501.log 286211 Log file, useful mostly for debugging
Form_19501.log 869 Log file, useful mostly for debugging
Tune-1950-Stewart_SCAJMR_1784-V1.abc 159 ABC music file with the extracted tune(s)
Tune-1950-Stewart_SCAJMR_1784-V1.ps 6 PostScript
Tune-1950-Stewart_SCAJMR_1784-V1.txt 159 Plain-text file with the extracted tune(s)
Tune-1950-get.log 10034 Log file, useful mostly for debugging
Tune-19502-get.log 5553 Log file, useful mostly for debugging
Tune-19503-get.log 4583 Log file, useful mostly for debugging
Tune-19504-get.log 4150 Log file, useful mostly for debugging
Tune-19505-get.log 3984 Log file, useful mostly for debugging
Tune-19507-get.log 12718 Log file, useful mostly for debugging
Tune-19508-get.log 9020 Log file, useful mostly for debugging
Tune-19509-get.log 9867 Log file, useful mostly for debugging
These files should be available for 24 hours.