pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4077-4304_the_Britches_Maker.ps) >>/Users/jc/w/tmp/Tune-4077-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CSR/4304_the_Britches_Maker.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_40773.log 440211 Log file, useful mostly for debugging
Coll_40775.log 438809 Log file, useful mostly for debugging
Coll_40778.log 447210 Log file, useful mostly for debugging
Form_40772.log 868 Log file, useful mostly for debugging
Tune-4077-4304_the_Britches_Maker.abc 1041 ABC music file with the extracted tune(s)
Tune-4077-4304_the_Britches_Maker.ps 40083 PostScript
Tune-4077-4304_the_Britches_Maker.txt 1041 Plain-text file with the extracted tune(s)
Tune-4077-get.log 4834 Log file, useful mostly for debugging
These files should be available for 24 hours.