pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-38517-MCCD_v2.ps) >>/Users/jc/w/tmp/Tune-38517-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/IgnatiusSancho/MCCD_v2.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_38517.log 448609 Log file, useful mostly for debugging
Tune-38517-MCCD_v2.abc 29633 ABC music file with the extracted tune(s)
Tune-38517-MCCD_v2.ps 201645 PostScript
Tune-38517-MCCD_v2.txt 29633 Plain-text file with the extracted tune(s)
Tune-38517-get.log 18133 Log file, useful mostly for debugging
These files should be available for 24 hours.