pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7261-MNSKYV2.ps) >>/Users/jc/w/tmp/Tune-7261-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/orig/MNSKYV2.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_72612.log 137362 Log file, useful mostly for debugging
Form_72611.log 847 Log file, useful mostly for debugging
Form_72617.log 870 Log file, useful mostly for debugging
Tune-7261-MNSKYV2.abc 1303 ABC music file with the extracted tune(s)
Tune-7261-MNSKYV2.ps 52629 PostScript
Tune-7261-MNSKYV2.txt 1303 Plain-text file with the extracted tune(s)
Tune-7261-get.log 4473 Log file, useful mostly for debugging
Tune-72614-get.log 3259 Log file, useful mostly for debugging
Tune-72616-get.log 2297 Log file, useful mostly for debugging
These files should be available for 24 hours.