pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-90987-Waltz_Jam_2018.ps) >>/Users/jc/w/tmp/Tune-90987-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/session/waltz/Waltz_Jam_2018.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
Form_90987.log 836 Log file, useful mostly for debugging
Tune-90987-Waltz_Jam_2018.abc 679 ABC music file with the extracted tune(s)
Tune-90987-Waltz_Jam_2018.ps 35089 PostScript
Tune-90987-Waltz_Jam_2018.txt 679 Plain-text file with the extracted tune(s)
Tune-90987-get.log 4748 Log file, useful mostly for debugging
These files should be available for 24 hours.