pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3776-1800_Thompson_FCCD-V1.ps) >>/Users/jc/w/tmp/Tune-3776-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1800_Thompson_FCCD-V1.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_3776.log 466809 Log file, useful mostly for debugging
Coll_37760.log 451411 Log file, useful mostly for debugging
Coll_37762.log 458410 Log file, useful mostly for debugging
Coll_37763.log 452809 Log file, useful mostly for debugging
Coll_37768.log 918219 Log file, useful mostly for debugging
Form_37761.log 940 Log file, useful mostly for debugging
Form_37766.log 1030 Log file, useful mostly for debugging
Form_37767.log 1022 Log file, useful mostly for debugging
Tune-3776-1800_Thompson_FCCD-V1.abc 15710 ABC music file with the extracted tune(s)
Tune-3776-1800_Thompson_FCCD-V1.ps 118292 PostScript
Tune-3776-1800_Thompson_FCCD-V1.txt 15710 Plain-text file with the extracted tune(s)
Tune-3776-get.log 11899 Log file, useful mostly for debugging
These files should be available for 24 hours.