pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-793-IndianPointJ_Em.ps) >>/Users/jc/w/tmp/Tune-793-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/IndianPointJ_Em.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_79301.log 353175 Log file, useful mostly for debugging
Coll_79313.log 363010 Log file, useful mostly for debugging
Coll_79325.log 355985 Log file, useful mostly for debugging
Coll_79336.log 354580 Log file, useful mostly for debugging
Coll_79341.log 261849 Log file, useful mostly for debugging
Coll_79347.log 350365 Log file, useful mostly for debugging
Coll_79358.log 348960 Log file, useful mostly for debugging
Coll_79369.log 354580 Log file, useful mostly for debugging
Coll_79380.log 354580 Log file, useful mostly for debugging
Coll_79392.log 243589 Log file, useful mostly for debugging
Coll_79399.log 266064 Log file, useful mostly for debugging
Tune-793-IndianPointJ_Em.abc 419 ABC music file with the extracted tune(s)
Tune-793-IndianPointJ_Em.ps 34958 PostScript
Tune-793-IndianPointJ_Em.txt 419 Plain-text file with the extracted tune(s)
Tune-793-get.log 4486 Log file, useful mostly for debugging
Tune-79300-EbbTide-001.svg 68226 Scalable Vector Graphics format
Tune-79300-EbbTide.abc 1270 ABC music file with the extracted tune(s)
Tune-79300-EbbTide.txt 1270 Plain-text file with the extracted tune(s)
Tune-79300-get.log 7780 Log file, useful mostly for debugging
Tune-79310-RJ_2019_Set4.abc 1420 ABC music file with the extracted tune(s)
Tune-79310-RJ_2019_Set4.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-79310-RJ_2019_Set4.ps 44678 PostScript
Tune-79310-RJ_2019_Set4.txt 1420 Plain-text file with the extracted tune(s)
Tune-79310-get.log 6773 Log file, useful mostly for debugging
Tune-79317-get.log 5544 Log file, useful mostly for debugging
Tune-79328-get.log 3294 Log file, useful mostly for debugging
Tune-79349-get.log 9123 Log file, useful mostly for debugging
Tune-79357-get.log 4772 Log file, useful mostly for debugging
Tune-79376-get.log 4091 Log file, useful mostly for debugging
These files should be available for 24 hours.