Error in WebDyn Pro

Hello all,

I am haveing Netweaver developer studio 7.0.13 and portal server 6.0 and when i tried to create simple web Dynpro application it throws me this error.

com.sap.tc.webdynpro.repository.RepositoryRuntimeException: XMLParser: Bad attribute list. Expected WhiteSpace, / or >: (:main:, row:1, col:493)

at the time of running application.

Please suggest me what is the possible cause of it.

Thanks in Advance

Vinit Soni