Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1766/Remick.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9921-Remick.ps) >>/Users/jc/w/tmp/Tune-9921-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1766/Remick.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_99212.log 809 Log file, useful mostly for debugging
Form_99218.log 1256 Log file, useful mostly for debugging
Tune-9921-Remick.abc 143 ABC music file with the extracted tune(s)
Tune-9921-Remick.ps 6 PostScript
Tune-9921-Remick.txt 143 Plain-text file with the extracted tune(s)
Tune-9921-get.log 3980 Log file, useful mostly for debugging
Tune-99214-get.log 4030 Log file, useful mostly for debugging
Tune-99215-endo.abc 141 ABC music file with the extracted tune(s)
Tune-99215-endo.ps 6 PostScript
Tune-99215-endo.txt 141 Plain-text file with the extracted tune(s)
Tune-99215-get.log 3984 Log file, useful mostly for debugging
Tune-99216-Kerr_MM1-V2.abc 148 ABC music file with the extracted tune(s)
Tune-99216-Kerr_MM1-V2.pdf 2217 Portable Data Format
Tune-99216-Kerr_MM1-V2.ps 6 PostScript
Tune-99216-Kerr_MM1-V2.txt 148 Plain-text file with the extracted tune(s)
Tune-99216-get.log 4909 Log file, useful mostly for debugging
These files should be available for 24 hours.