pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-30049-042_MrsGeorgeForshawsStrathspey.ps) >>/Users/jc/w/tmp/Tune-30049-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AbrahamMackintosh/042_MrsGeorgeForshawsStrathspey.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_30049.log 479411 Log file, useful mostly for debugging
Tune-30049-042_MrsGeorgeForshawsStrathspey.abc 883 ABC music file with the extracted tune(s)
Tune-30049-042_MrsGeorgeForshawsStrathspey.ps 38426 PostScript
Tune-30049-042_MrsGeorgeForshawsStrathspey.txt 883 Plain-text file with the extracted tune(s)
Tune-30049-get.log 5070 Log file, useful mostly for debugging
These files should be available for 24 hours.