Exception from HRESULT

Question

    Hello everyone,


     In my application I automate word with c# project.So open it from my project,paste text in it then delete text from it to use same document instead of creating new document everytime....
 
    It works fine while i use it first time but after deleting when i tried to use it second time its giving me exception

"An outgoing call cannot be made since the application is dispatching an input-synchronous call. (Exception from HRESULT)"

   Please help me to solve this error