pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-29375-096_Hes_Comin_Again.ps) >>/Users/jc/w/tmp/Tune-29375-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Chappell/096_Hes_Comin_Again.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_29375.log 1004 Log file, useful mostly for debugging
Sess-29375.log 2608670 Log file, useful mostly for debugging
Tune-29375-096_Hes_Comin_Again.abc 585 ABC music file with the extracted tune(s)
Tune-29375-096_Hes_Comin_Again.ps 36163 PostScript
Tune-29375-096_Hes_Comin_Again.txt 585 Plain-text file with the extracted tune(s)
Tune-29375-get.log 5312 Log file, useful mostly for debugging
These files should be available for 24 hours.