pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7810-Caller_Herrin_2.ps) >>/Users/jc/w/tmp/Tune-7810-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/corneymusers/Caller_Herrin_2.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_78106.log 263379 Log file, useful mostly for debugging
Form_78100.log 820 Log file, useful mostly for debugging
Form_78109.log 845 Log file, useful mostly for debugging
Tune-7810-Caller_Herrin_2.abc 501 ABC music file with the extracted tune(s)
Tune-7810-Caller_Herrin_2.ps 40497 PostScript
Tune-7810-Caller_Herrin_2.txt 501 Plain-text file with the extracted tune(s)
Tune-7810-get.log 4524 Log file, useful mostly for debugging
Tune-78102-get.log 6451 Log file, useful mostly for debugging
Tune-78102-s.abc 164 ABC music file with the extracted tune(s)
Tune-78102-s.txt 164 Plain-text file with the extracted tune(s)
Tune-78107-Shepherds_Carol.abc 396 ABC music file with the extracted tune(s)
Tune-78107-Shepherds_Carol.ps 6 PostScript
Tune-78107-Shepherds_Carol.txt 396 Plain-text file with the extracted tune(s)
Tune-78107-get.log 4320 Log file, useful mostly for debugging
These files should be available for 24 hours.