pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4341-barn_t.ps) >>/Users/jc/w/tmp/Tune-4341-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/scand/barn_t.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_43414.log 280115 Log file, useful mostly for debugging
Coll_43417.log 273090 Log file, useful mostly for debugging
Tune-4341-barn_t.abc 4842 ABC music file with the extracted tune(s)
Tune-4341-barn_t.ps 77754 PostScript
Tune-4341-barn_t.txt 4842 Plain-text file with the extracted tune(s)
Tune-4341-get.log 14897 Log file, useful mostly for debugging
Tune-43412-get.log 4471 Log file, useful mostly for debugging
Tune-43412-x11.abc 171 ABC music file with the extracted tune(s)
Tune-43412-x11.pdf 2730 Portable Data Format
Tune-43412-x11.ps 32395 PostScript
Tune-43412-x11.txt 171 Plain-text file with the extracted tune(s)
Tune-43413-get.log 1301 Log file, useful mostly for debugging
These files should be available for 24 hours.