Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/10thBook/Gow-CSR4-abc2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5825-Gow-CSR4-abc2.ps) >>/Users/jc/w/tmp/Tune-5825-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/10thBook/Gow-CSR4-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
Tune-5825-Gow-CSR4-abc2.abc 154 ABC music file with the extracted tune(s)
Tune-5825-Gow-CSR4-abc2.ps 6 PostScript
Tune-5825-Gow-CSR4-abc2.txt 154 Plain-text file with the extracted tune(s)
Tune-5825-get.log 4153 Log file, useful mostly for debugging
Tune-58250-Pat_Shaw_NewWineInOldBottles.abc 167 ABC music file with the extracted tune(s)
Tune-58250-Pat_Shaw_NewWineInOldBottles.ps 6 PostScript
Tune-58250-Pat_Shaw_NewWineInOldBottles.txt 167 Plain-text file with the extracted tune(s)
Tune-58250-get.log 4383 Log file, useful mostly for debugging
Tune-58253-24CountryDances_1818_Button_Whitaker.abc 175 ABC music file with the extracted tune(s)
Tune-58253-24CountryDances_1818_Button_Whitaker.txt 175 Plain-text file with the extracted tune(s)
Tune-58253-get.log 3666 Log file, useful mostly for debugging
These files should be available for 24 hours.