pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-794-30221_Bellville_Quickstep.ps) >>/Users/jc/w/tmp/Tune-794-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP3/30221_Bellville_Quickstep.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_79427.log 109614 Log file, useful mostly for debugging
Find_79487.log 1511 Log file, useful mostly for debugging
Form_79418.log 818 Log file, useful mostly for debugging
Form_7949.log 968 Log file, useful mostly for debugging
Sess-79442.log 1134299 Log file, useful mostly for debugging
Sess-79488.log 92729268 Log file, useful mostly for debugging
Tune-794-30221_Bellville_Quickstep.abc 1291 ABC music file with the extracted tune(s)
Tune-794-30221_Bellville_Quickstep.ps 42105 PostScript
Tune-794-30221_Bellville_Quickstep.txt 1291 Plain-text file with the extracted tune(s)
Tune-794-get.log 5027 Log file, useful mostly for debugging
Tune-79405-get.log 1398 Log file, useful mostly for debugging
Tune-79414-get.log 1398 Log file, useful mostly for debugging
Tune-79438-get.log 1398 Log file, useful mostly for debugging
Tune-79439-MrIsaacsMaggot-001.svg 19420 Scalable Vector Graphics format
Tune-79439-MrIsaacsMaggot.abc 514 ABC music file with the extracted tune(s)
Tune-79439-MrIsaacsMaggot.txt 514 Plain-text file with the extracted tune(s)
Tune-79439-get.log 4154 Log file, useful mostly for debugging
Tune-79477-ConfesseHisTune.abc 345 ABC music file with the extracted tune(s)
Tune-79477-ConfesseHisTune.pdf 13273 Portable Data Format
Tune-79477-ConfesseHisTune.ps 32624 PostScript
Tune-79477-ConfesseHisTune.txt 345 Plain-text file with the extracted tune(s)
Tune-79477-get.log 5931 Log file, useful mostly for debugging
These files should be available for 24 hours.