X:1 not found in http://www.ibiblio.org/fiddlers/MISSA_MISSF.htm
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-82263-MISSA_MISSF.ps) >>/Users/jc/w/tmp/Tune-82263-get.log 2>&1" returned status 256
http://www.ibiblio.org/fiddlers/MISSA_MISSF.htm

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-82263-MISSA_MISSF.abc 0 ABC music file with the extracted tune(s)
Tune-82263-MISSA_MISSF.ps 0 PostScript
Tune-82263-MISSA_MISSF.txt 0 Plain-text file with the extracted tune(s)
Tune-82263-get.log 0 Log file, useful mostly for debugging
These files should be available for 24 hours.