pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7683-HUTB1-1844-V2.ps) >>/Users/jc/w/tmp/Tune-7683-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Hamilton/HUTB1/HUTB1-1844-V2.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_76834.log 64184 Log file, useful mostly for debugging
Tune-7683-HUTB1-1844-V2.abc 561 ABC music file with the extracted tune(s)
Tune-7683-HUTB1-1844-V2.ps 35841 PostScript
Tune-7683-HUTB1-1844-V2.txt 561 Plain-text file with the extracted tune(s)
Tune-7683-get.log 4363 Log file, useful mostly for debugging
Tune-76832-get.log 5182 Log file, useful mostly for debugging
Tune-76839-get.log 1669 Log file, useful mostly for debugging
These files should be available for 24 hours.