pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2100-1311_Lady_Harriot_Hope.ps) >>/Users/jc/w/tmp/Tune-2100-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1311_Lady_Harriot_Hope.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_21001.log 949 Log file, useful mostly for debugging
Form_21003.log 1101 Log file, useful mostly for debugging
Tune-2100-1311_Lady_Harriot_Hope.abc 833 ABC music file with the extracted tune(s)
Tune-2100-1311_Lady_Harriot_Hope.ps 37933 PostScript
Tune-2100-1311_Lady_Harriot_Hope.txt 833 Plain-text file with the extracted tune(s)
Tune-2100-get.log 4683 Log file, useful mostly for debugging
Tune-21004-get.log 4157 Log file, useful mostly for debugging
Tune-21007-get.log 5994 Log file, useful mostly for debugging
These files should be available for 24 hours.