pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2666-CrookedStovepipe3The.ps) >>/Users/jc/w/tmp/Tune-2666-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Square/CrookedStovepipe3The.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_26662.log 884910 Log file, useful mostly for debugging
Coll_26669.log 129903 Log file, useful mostly for debugging
Find_26664.log 1610 Log file, useful mostly for debugging
Tune-2666-CrookedStovepipe3The.abc 554 ABC music file with the extracted tune(s)
Tune-2666-CrookedStovepipe3The.ps 34100 PostScript
Tune-2666-CrookedStovepipe3The.txt 554 Plain-text file with the extracted tune(s)
Tune-2666-get.log 9344 Log file, useful mostly for debugging
Tune-26660-get.log 11188 Log file, useful mostly for debugging
Tune-26661-get.log 5002 Log file, useful mostly for debugging
Tune-26667-get.log 4201 Log file, useful mostly for debugging
These files should be available for 24 hours.