pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-21049-Jamie_Lavals_Welcome_to_Glasgow-D-16-3.ps) >>/Users/jc/w/tmp/Tune-21049-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Scotland/Jamie_Lavals_Welcome_to_Glasgow-D-16-3.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
Tune-21049-Jamie_Lavals_Welcome_to_Glasgow-D-16-3.abc 502 ABC music file with the extracted tune(s)
Tune-21049-Jamie_Lavals_Welcome_to_Glasgow-D-16-3.ps 36933 PostScript
Tune-21049-Jamie_Lavals_Welcome_to_Glasgow-D-16-3.txt 502 Plain-text file with the extracted tune(s)
Tune-21049-get.log 4924 Log file, useful mostly for debugging
These files should be available for 24 hours.