Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Book26/CSGBT_1794-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5406-CSGBT_1794-V1.ps) >>/Users/jc/w/tmp/Tune-5406-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Book26/CSGBT_1794-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
Tune-5406-CSGBT_1794-V1.abc 152 ABC music file with the extracted tune(s)
Tune-5406-CSGBT_1794-V1.ps 6 PostScript
Tune-5406-CSGBT_1794-V1.txt 152 Plain-text file with the extracted tune(s)
Tune-5406-get.log 4141 Log file, useful mostly for debugging
Tune-54060-get.log 1410 Log file, useful mostly for debugging
Tune-54062-CSRHW-abc2.abc 147 ABC music file with the extracted tune(s)
Tune-54062-CSRHW-abc2.txt 147 Plain-text file with the extracted tune(s)
Tune-54062-get.log 8648 Log file, useful mostly for debugging
Tune-54063-get.log 1328 Log file, useful mostly for debugging
Tune-54065-get.log 1263 Log file, useful mostly for debugging
Tune-54068-JohnWalsh.abc 147 ABC music file with the extracted tune(s)
Tune-54068-JohnWalsh.pdf 2211 Portable Data Format
Tune-54068-JohnWalsh.ps 6 PostScript
Tune-54068-JohnWalsh.txt 147 Plain-text file with the extracted tune(s)
Tune-54068-get.log 6187 Log file, useful mostly for debugging
These files should be available for 24 hours.