pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9187-2018_jigs.ps) >>/Users/jc/w/tmp/Tune-9187-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/StPatsDay/2018_jigs.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_91878.log 68504 Log file, useful mostly for debugging
Tune-9187-2018_jigs.abc 615 ABC music file with the extracted tune(s)
Tune-9187-2018_jigs.ps 34232 PostScript
Tune-9187-2018_jigs.txt 615 Plain-text file with the extracted tune(s)
Tune-9187-get.log 5554 Log file, useful mostly for debugging
These files should be available for 24 hours.