pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6776-OComeAllYeFaithful.ps) >>/Users/jc/w/tmp/Tune-6776-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/England/OComeAllYeFaithful.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_67768.log 561635 Log file, useful mostly for debugging
Tune-6776-OComeAllYeFaithful.abc 947 ABC music file with the extracted tune(s)
Tune-6776-OComeAllYeFaithful.ps 37535 PostScript
Tune-6776-OComeAllYeFaithful.txt 947 Plain-text file with the extracted tune(s)
Tune-6776-get.log 4552 Log file, useful mostly for debugging
Tune-67764-Pols_Slang5-001.svg 79429 Scalable Vector Graphics format
Tune-67764-Pols_Slang5.abc 2227 ABC music file with the extracted tune(s)
Tune-67764-Pols_Slang5.txt 2227 Plain-text file with the extracted tune(s)
Tune-67764-get.log 5429 Log file, useful mostly for debugging
Tune-67768-get.log 1396 Log file, useful mostly for debugging
These files should be available for 24 hours.