unknown sqlstate code

I don't know if this is the correct list, but does any
one know what sqlstate code YE000 indicates?
I checked the Appendix of sqlstate codes for the
version 7.4.8 that is being used and I don't see it
on the list?

All I can tell is it has something to do with the cursor
that is trying to be opened in a ecpg/C program.

Thanks in advance,
Julie