Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MusiciansCompanionP2/RSCDS_Graded1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2888-RSCDS_Graded1.ps) >>/Users/jc/w/tmp/Tune-2888-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MusiciansCompanionP2/RSCDS_Graded1.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_28880.log 150618 Log file, useful mostly for debugging
Tune-2888-RSCDS_Graded1.abc 166 ABC music file with the extracted tune(s)
Tune-2888-RSCDS_Graded1.ps 6 PostScript
Tune-2888-RSCDS_Graded1.txt 166 Plain-text file with the extracted tune(s)
Tune-2888-get.log 4219 Log file, useful mostly for debugging
Tune-28881-get.log 4476 Log file, useful mostly for debugging
Tune-28882-get.log 4521 Log file, useful mostly for debugging
Tune-28883-get.log 11265 Log file, useful mostly for debugging
Tune-28884-get.log 4257 Log file, useful mostly for debugging
Tune-28885-get.log 9048 Log file, useful mostly for debugging
Tune-28886-get.log 9407 Log file, useful mostly for debugging
Tune-28887-get.log 3558 Log file, useful mostly for debugging
Tune-28889-get.log 4449 Log file, useful mostly for debugging
These files should be available for 24 hours.