pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9896-Scotch_Mary_C.ps) >>/Users/jc/w/tmp/Tune-9896-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/reel/Scotch_Mary_C.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
Form_98967.log 856 Log file, useful mostly for debugging
Tune-9896-Scotch_Mary_C.abc 358 ABC music file with the extracted tune(s)
Tune-9896-Scotch_Mary_C.ps 35855 PostScript
Tune-9896-Scotch_Mary_C.txt 358 Plain-text file with the extracted tune(s)
Tune-9896-get.log 4354 Log file, useful mostly for debugging
Tune-98961-get.log 2608 Log file, useful mostly for debugging
Tune-98965-get.log 9409 Log file, useful mostly for debugging
These files should be available for 24 hours.