Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/S/SocialDances2002.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9536-SocialDances2002.ps) >>/Users/jc/w/tmp/Tune-9536-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/S/SocialDances2002.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_95360.log 278710 Log file, useful mostly for debugging
Coll_95369.log 271684 Log file, useful mostly for debugging
Form_95361.log 827 Log file, useful mostly for debugging
Tune-9536-SocialDances2002.abc 150 ABC music file with the extracted tune(s)
Tune-9536-SocialDances2002.ps 6 PostScript
Tune-9536-SocialDances2002.txt 150 Plain-text file with the extracted tune(s)
Tune-9536-get.log 4170 Log file, useful mostly for debugging
Tune-95361-ERM-V1.abc 142 ABC music file with the extracted tune(s)
Tune-95361-ERM-V1.txt 142 Plain-text file with the extracted tune(s)
Tune-95361-get.log 3106 Log file, useful mostly for debugging
Tune-95369-Thompson_V2_1758-1765_FTM.abc 161 ABC music file with the extracted tune(s)
Tune-95369-Thompson_V2_1758-1765_FTM.ps 6 PostScript
Tune-95369-Thompson_V2_1758-1765_FTM.txt 161 Plain-text file with the extracted tune(s)
Tune-95369-get.log 4300 Log file, useful mostly for debugging
These files should be available for 24 hours.