pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7750-GlenoraFerry.ps) >>/Users/jc/w/tmp/Tune-7750-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/GlenoraFerry.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_7750.log 292760 Log file, useful mostly for debugging
Coll_77501.log 291355 Log file, useful mostly for debugging
Coll_77502.log 282928 Log file, useful mostly for debugging
Coll_77508.log 282925 Log file, useful mostly for debugging
Tune-7750-GlenoraFerry.abc 2014 ABC music file with the extracted tune(s)
Tune-7750-GlenoraFerry.ps 49538 PostScript
Tune-7750-GlenoraFerry.txt 2014 Plain-text file with the extracted tune(s)
Tune-7750-get.log 4870 Log file, useful mostly for debugging
Tune-77500-PeatInn2.abc 1720 ABC music file with the extracted tune(s)
Tune-77500-PeatInn2.pdf 38094 Portable Data Format
Tune-77500-PeatInn2.ps 43212 PostScript
Tune-77500-PeatInn2.txt 1720 Plain-text file with the extracted tune(s)
Tune-77500-get.log 5551 Log file, useful mostly for debugging
Tune-77501-Setesvalsen-001.svg 60652 Scalable Vector Graphics format
Tune-77501-Setesvalsen.abc 1983 ABC music file with the extracted tune(s)
Tune-77501-Setesvalsen.txt 1983 Plain-text file with the extracted tune(s)
Tune-77501-get.log 3961 Log file, useful mostly for debugging
Tune-77508-get.log 1396 Log file, useful mostly for debugging
These files should be available for 24 hours.