pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5040-session2.ps) >>/Users/jc/w/tmp/Tune-5040-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/mucl.de/~mdoering/session2.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_50407.log 67694 Log file, useful mostly for debugging
Form_50403.log 772 Log file, useful mostly for debugging
Form_50409.log 798 Log file, useful mostly for debugging
Tune-5040-get.log 23100 Log file, useful mostly for debugging
Tune-5040-session2.abc 359 ABC music file with the extracted tune(s)
Tune-5040-session2.ps 34952 PostScript
Tune-5040-session2.txt 359 Plain-text file with the extracted tune(s)
Tune-50401-get.log 3028 Log file, useful mostly for debugging
Tune-50406-MyCapeBretonHome_G.abc 159 ABC music file with the extracted tune(s)
Tune-50406-MyCapeBretonHome_G.pdf 2217 Portable Data Format
Tune-50406-MyCapeBretonHome_G.ps 6 PostScript
Tune-50406-MyCapeBretonHome_G.txt 159 Plain-text file with the extracted tune(s)
Tune-50406-get.log 5021 Log file, useful mostly for debugging
Tune-50409-get.log 4957 Log file, useful mostly for debugging
These files should be available for 24 hours.