pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-19618-4303.ps) >>/Users/jc/w/tmp/Tune-19618-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4303=Mrs_Crawfords_Favorite_Strathspey.abc2.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_19618.log 268011 Log file, useful mostly for debugging
Tune-19618-4303.abc 1136 ABC music file with the extracted tune(s)
Tune-19618-4303.ps 41664 PostScript
Tune-19618-4303.txt 1136 Plain-text file with the extracted tune(s)
Tune-19618-get.log 4948 Log file, useful mostly for debugging
These files should be available for 24 hours.