X:10 not found in http://www.novasession.com/bw/bwslides.txt
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92045-bwslides.ps) >>/Users/jc/w/tmp/Tune-92045-get.log 2>&1" returned status 256
http://www.novasession.com/bw/bwslides.txt

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-92045-bwslides.abc 0 ABC music file with the extracted tune(s)
Tune-92045-bwslides.ps 6 PostScript
Tune-92045-bwslides.txt 0 Plain-text file with the extracted tune(s)
Tune-92045-get.log 4169 Log file, useful mostly for debugging
These files should be available for 24 hours.