pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35169-261_CapHoodsQuickMarch.ps) >>/Users/jc/w/tmp/Tune-35169-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AbrahamMackintosh/261_CapHoodsQuickMarch.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-35169-143_LadyAnnGordonsReel.abc 676 ABC music file with the extracted tune(s)
Tune-35169-143_LadyAnnGordonsReel.ps 34741 PostScript
Tune-35169-143_LadyAnnGordonsReel.txt 676 Plain-text file with the extracted tune(s)
Tune-35169-261_CapHoodsQuickMarch.abc 1128 ABC music file with the extracted tune(s)
Tune-35169-261_CapHoodsQuickMarch.ps 40295 PostScript
Tune-35169-261_CapHoodsQuickMarch.txt 1128 Plain-text file with the extracted tune(s)
Tune-35169-get.log 9694 Log file, useful mostly for debugging
These files should be available for 24 hours.