pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41300-McQuillensSqueezebox.ps) >>/Users/jc/w/tmp/Tune-41300-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/KC/McQuillensSqueezebox.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-41300-McQuillensSqueezebox.abc 826 ABC music file with the extracted tune(s)
Tune-41300-McQuillensSqueezebox.ps 38977 PostScript
Tune-41300-McQuillensSqueezebox.txt 826 Plain-text file with the extracted tune(s)
Tune-41300-get.log 10104 Log file, useful mostly for debugging
These files should be available for 24 hours.