Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/mixed/Kerr_MM2-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7663-Kerr_MM2-V1.ps) >>/Users/jc/w/tmp/Tune-7663-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/mixed/Kerr_MM2-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
Form_76630.log 969 Log file, useful mostly for debugging
Form_76639.log 808 Log file, useful mostly for debugging
Tune-7663-Kerr_MM2-V1.abc 149 ABC music file with the extracted tune(s)
Tune-7663-Kerr_MM2-V1.ps 6 PostScript
Tune-7663-Kerr_MM2-V1.txt 149 Plain-text file with the extracted tune(s)
Tune-7663-get.log 4093 Log file, useful mostly for debugging
Tune-76630-CDSS_CDoT.abc 146 ABC music file with the extracted tune(s)
Tune-76630-CDSS_CDoT.pdf 2217 Portable Data Format
Tune-76630-CDSS_CDoT.ps 6 PostScript
Tune-76630-CDSS_CDoT.txt 146 Plain-text file with the extracted tune(s)
Tune-76630-get.log 4853 Log file, useful mostly for debugging
Tune-76634-Gallini_NewColl44Cot1.abc 157 ABC music file with the extracted tune(s)
Tune-76634-Gallini_NewColl44Cot1.ps 6 PostScript
Tune-76634-Gallini_NewColl44Cot1.txt 157 Plain-text file with the extracted tune(s)
Tune-76634-get.log 4335 Log file, useful mostly for debugging
Tune-76636-get.log 8682 Log file, useful mostly for debugging
Tune-76637-get.log 4366 Log file, useful mostly for debugging
These files should be available for 24 hours.