Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/new/Playford_COST.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8639-Playford_COST.ps) >>/Users/jc/w/tmp/Tune-8639-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/new/Playford_COST.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_8639.log 1590 Log file, useful mostly for debugging
Tune-8639-Playford_COST.abc 149 ABC music file with the extracted tune(s)
Tune-8639-Playford_COST.ps 6 PostScript
Tune-8639-Playford_COST.txt 149 Plain-text file with the extracted tune(s)
Tune-8639-RSCDS_Graded1.abc 153 ABC music file with the extracted tune(s)
Tune-8639-RSCDS_Graded1.ps 6 PostScript
Tune-8639-RSCDS_Graded1.txt 153 Plain-text file with the extracted tune(s)
Tune-8639-get.log 8180 Log file, useful mostly for debugging
Tune-86392-get.log 5038 Log file, useful mostly for debugging
Tune-86395-get.log 2910 Log file, useful mostly for debugging
Tune-86396-MoF.abc 140 ABC music file with the extracted tune(s)
Tune-86396-MoF.ps 6 PostScript
Tune-86396-MoF.txt 140 Plain-text file with the extracted tune(s)
Tune-86396-get.log 3846 Log file, useful mostly for debugging
Tune-86397-get.log 3542 Log file, useful mostly for debugging
Tune-86399-10031_Sweet_Home-001.svg 41737 Scalable Vector Graphics format
Tune-86399-10031_Sweet_Home.abc 1478 ABC music file with the extracted tune(s)
Tune-86399-10031_Sweet_Home.txt 1478 Plain-text file with the extracted tune(s)
Tune-86399-get.log 4338 Log file, useful mostly for debugging
These files should be available for 24 hours.