pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3525-Friendly_Visit.ps) >>/Users/jc/w/tmp/Tune-3525-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/src/jcabc2ps-201511002/abc/Friendly_Visit.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_35259.log 132522 Log file, useful mostly for debugging
Find_35254.log 1491 Log file, useful mostly for debugging
Form_35253.log 878 Log file, useful mostly for debugging
Form_35255.log 885 Log file, useful mostly for debugging
Tune-3525-Friendly_Visit.abc 493 ABC music file with the extracted tune(s)
Tune-3525-Friendly_Visit.ps 36418 PostScript
Tune-3525-Friendly_Visit.txt 493 Plain-text file with the extracted tune(s)
Tune-3525-get.log 4627 Log file, useful mostly for debugging
Tune-35250-get.log 33395 Log file, useful mostly for debugging
These files should be available for 24 hours.