Error ["Unspecified Error"] while inserting data from XML to database using a Stored P

I am gettng the following error message when I try inserting data from a XML to the database (using a Stored Proc). The value of an attribute in the XML tag is very long, and when I try splitting that into multiple strings and insert each one separately to the database, to analyze the issue, I find that all the strings are getting inserted individually without any problem. But when I insert the concatenated form of the string as a whole then it gives me this problem.

Msg 6602, Level 16, State 2, Procedure sp_xml_preparedocument, Line 1

The error description is 'Unspecified error'.

Msg 8179, Level 16, State 5, Procedure InsertWinAPIInfo, Line 61

Could not find prepared statement with handle 0.

The statement has been terminated.

Msg 6607, Level 16, State 3, Procedure sp_xml_removedocument, Line 1

sp_xml_removedocument: The value supplied for parameter number 1 is invalid.

I have tried searching on the net and did not find any possible solution for this. Please help me.You are probably hitting some limit on attribute length of the tag, and this is causing sp_xml_preparedocument to fail.|||You are probably hitting some limit on attribute length of the tag, and this is causing sp_xml_preparedocument to fail. I could not find any documentation as to the maximum length allowed for an attribute but internally I think sp_xml_preparedocument uses msxml parser so you can review docs for msxml parser to see what the limits are.