pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8647-HUTB2-1846-V1.ps) >>/Users/jc/w/tmp/Tune-8647-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Hamilton/HUTB2/HUTB2-1846-V1.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_86472.log 276509 Log file, useful mostly for debugging
Coll_86477.log 272339 Log file, useful mostly for debugging
Find_86478.log 1427 Log file, useful mostly for debugging
Form_8647.log 736 Log file, useful mostly for debugging
Form_86476.log 727 Log file, useful mostly for debugging
Form_86477.log 728 Log file, useful mostly for debugging
Form_86479.log 742 Log file, useful mostly for debugging
Tune-8647-HUTB2-1846-V1.abc 1218 ABC music file with the extracted tune(s)
Tune-8647-HUTB2-1846-V1.ps 44365 PostScript
Tune-8647-HUTB2-1846-V1.txt 1218 Plain-text file with the extracted tune(s)
Tune-8647-get.log 4421 Log file, useful mostly for debugging
Tune-86470-get.log 9881 Log file, useful mostly for debugging
These files should be available for 24 hours.