Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1783/RobertBremner_CSRCD1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3860-RobertBremner_CSRCD1.ps) >>/Users/jc/w/tmp/Tune-3860-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1783/RobertBremner_CSRCD1.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_38601.log 437411 Log file, useful mostly for debugging
Coll_38608.log 286209 Log file, useful mostly for debugging
Tune-3860-RobertBremner_CSRCD1.abc 157 ABC music file with the extracted tune(s)
Tune-3860-RobertBremner_CSRCD1.ps 6 PostScript
Tune-3860-RobertBremner_CSRCD1.txt 157 Plain-text file with the extracted tune(s)
Tune-3860-get.log 4276 Log file, useful mostly for debugging
Tune-38600-EliasHowe_MusiciansCompanionP2-1843-V2.abc 175 ABC music file with the extracted tune(s)
Tune-38600-EliasHowe_MusiciansCompanionP2-1843-V2.ps 6 PostScript
Tune-38600-EliasHowe_MusiciansCompanionP2-1843-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-38600-get.log 4601 Log file, useful mostly for debugging
Tune-38602-get.log 1292 Log file, useful mostly for debugging
Tune-38606-Pringle.abc 144 ABC music file with the extracted tune(s)
Tune-38606-Pringle.ps 6 PostScript
Tune-38606-Pringle.txt 144 Plain-text file with the extracted tune(s)
Tune-38606-get.log 3930 Log file, useful mostly for debugging
Tune-38607-Gow-CR-abc2.abc 148 ABC music file with the extracted tune(s)
Tune-38607-Gow-CR-abc2.ps 6 PostScript
Tune-38607-Gow-CR-abc2.txt 148 Plain-text file with the extracted tune(s)
Tune-38607-get.log 4014 Log file, useful mostly for debugging
These files should be available for 24 hours.