Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/CCCCD2/Gow-CSR2-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7142-Gow-CSR2-abc2.ps) >>/Users/jc/w/tmp/Tune-7142-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CCCCD2/Gow-CSR2-abc2.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_71422.log 1006161 Log file, useful mostly for debugging
Tune-7142-Gow-CSR2-abc2.abc 152 ABC music file with the extracted tune(s)
Tune-7142-Gow-CSR2-abc2.ps 6 PostScript
Tune-7142-Gow-CSR2-abc2.txt 152 Plain-text file with the extracted tune(s)
Tune-7142-get.log 4137 Log file, useful mostly for debugging
Tune-71422-RSCDS_Graded2.abc 149 ABC music file with the extracted tune(s)
Tune-71422-RSCDS_Graded2.pdf 2217 Portable Data Format
Tune-71422-RSCDS_Graded2.ps 6 PostScript
Tune-71422-RSCDS_Graded2.txt 149 Plain-text file with the extracted tune(s)
Tune-71422-get.log 4959 Log file, useful mostly for debugging
Tune-71426-FOEFDA.abc 142 ABC music file with the extracted tune(s)
Tune-71426-FOEFDA.txt 142 Plain-text file with the extracted tune(s)
Tune-71426-get.log 3102 Log file, useful mostly for debugging
These files should be available for 24 hours.