X:415 not found in http://lesters-tune-a-day.blogspot.fr/2015/05/
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1989-05.ps) >>/Users/jc/w/tmp/Tune-1989-get.log 2>&1" returned status 256
http://lesters-tune-a-day.blogspot.fr/2015/05/

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_19893.log 269019 Log file, useful mostly for debugging
Tune-1989-05.abc 0 ABC music file with the extracted tune(s)
Tune-1989-05.ps 6 PostScript
Tune-1989-05.txt 0 Plain-text file with the extracted tune(s)
Tune-1989-get.log 4103 Log file, useful mostly for debugging
Tune-19891-get.log 5571 Log file, useful mostly for debugging
Tune-19897-get.log 3531 Log file, useful mostly for debugging
Tune-19898-get.log 6604 Log file, useful mostly for debugging
These files should be available for 24 hours.