Exception 'SqlException': Error 777971002, severity 13, state 1 was raised

Hi,

Recently I recieved this error Exception 'SqlException': Error 777971002, severity 13, state 1 was raised , I searched it and found like this EXEC

UTE sp_addmessage @msgnum = 777980400, @msgtext = N'Cannot perform operation: Connector does not exist or is not initialized', @severity = 16, @lang = 'us_english', @with_log = false, @replace = 'REPLACE'
GO 

but my error number is 777971002 and this number isn't into searched collection.

thanks