pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1098-1052_PALMERS_QUICK-STEP.ps) >>/Users/jc/w/tmp/Tune-1098-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/BostonCollection/1052_PALMERS_QUICK-STEP.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_10987.log 156974 Log file, useful mostly for debugging
Form_10981.log 818 Log file, useful mostly for debugging
Tune-1098-1052_PALMERS_QUICK-STEP.abc 562 ABC music file with the extracted tune(s)
Tune-1098-1052_PALMERS_QUICK-STEP.ps 33591 PostScript
Tune-1098-1052_PALMERS_QUICK-STEP.txt 562 Plain-text file with the extracted tune(s)
Tune-1098-get.log 4826 Log file, useful mostly for debugging
These files should be available for 24 hours.