Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/JamesOswald/CPC/11341_the_Souters_of_Selkirk.abc/all"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2588-all.ps) >>/Users/jc/w/tmp/Tune-2588-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JamesOswald/CPC/11341_the_Souters_of_Selkirk.abc/all

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_2588.log 457010 Log file, useful mostly for debugging
Coll_25880.log 923820 Log file, useful mostly for debugging
Find_25889.log 1446 Log file, useful mostly for debugging
Tune-2588-all.abc 180 ABC music file with the extracted tune(s)
Tune-2588-all.ps 6 PostScript
Tune-2588-all.txt 180 Plain-text file with the extracted tune(s)
Tune-2588-get.log 4109 Log file, useful mostly for debugging
Tune-25880-get.log 14947 Log file, useful mostly for debugging
Tune-25885-get.log 4522 Log file, useful mostly for debugging
These files should be available for 24 hours.