pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91371-MissGibsonsStr4.ps) >>/Users/jc/w/tmp/Tune-91371-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MissGibsonsStr4.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-91371-MissGibsonsStr4.abc 2465 ABC music file with the extracted tune(s)
Tune-91371-MissGibsonsStr4.ps 53987 PostScript
Tune-91371-MissGibsonsStr4.txt 2465 Plain-text file with the extracted tune(s)
Tune-91371-MistOerTheLoch-001.svg 91406 Scalable Vector Graphics format
Tune-91371-MistOerTheLoch.abc 2233 ABC music file with the extracted tune(s)
Tune-91371-MistOerTheLoch.txt 2233 Plain-text file with the extracted tune(s)
Tune-91371-get.log 9588 Log file, useful mostly for debugging
These files should be available for 24 hours.