pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8464-RempartsDeSeville.ps) >>/Users/jc/w/tmp/Tune-8464-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/event/20180601/RempartsDeSeville.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_84640.log 756 Log file, useful mostly for debugging
Tune-8464-RempartsDeSeville.abc 602 ABC music file with the extracted tune(s)
Tune-8464-RempartsDeSeville.ps 35112 PostScript
Tune-8464-RempartsDeSeville.txt 602 Plain-text file with the extracted tune(s)
Tune-8464-get.log 4576 Log file, useful mostly for debugging
Tune-84640-get.log 4152 Log file, useful mostly for debugging
Tune-84644-get.log 3153 Log file, useful mostly for debugging
Tune-84644-training_abc_XX.abc 272 ABC music file with the extracted tune(s)
Tune-84644-training_abc_XX.txt 272 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.