Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/jig/CDSS_Gems.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9531-CDSS_Gems.ps) >>/Users/jc/w/tmp/Tune-9531-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/jig/CDSS_Gems.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-9531-CDSS_Gems.abc 145 ABC music file with the extracted tune(s)
Tune-9531-CDSS_Gems.ps 6 PostScript
Tune-9531-CDSS_Gems.txt 145 Plain-text file with the extracted tune(s)
Tune-9531-get.log 8027 Log file, useful mostly for debugging
Tune-95312-get.log 4687 Log file, useful mostly for debugging
Tune-95315-0952_RODERICK_DHUS_MARCH.abc 661 ABC music file with the extracted tune(s)
Tune-95315-0952_RODERICK_DHUS_MARCH.pdf 15836 Portable Data Format
Tune-95315-0952_RODERICK_DHUS_MARCH.ps 35683 PostScript
Tune-95315-0952_RODERICK_DHUS_MARCH.txt 661 Plain-text file with the extracted tune(s)
Tune-95315-get.log 5877 Log file, useful mostly for debugging
Tune-95316-EclipseHornpipe.abc 466 ABC music file with the extracted tune(s)
Tune-95316-EclipseHornpipe.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-95316-EclipseHornpipe.ps 35876 PostScript
Tune-95316-EclipseHornpipe.txt 466 Plain-text file with the extracted tune(s)
Tune-95316-get.log 5424 Log file, useful mostly for debugging
Tune-95317-get.log 3670 Log file, useful mostly for debugging
These files should be available for 24 hours.