Random Error message in IE. Invocation exception.

The gridview also allows paging and sorting. Another thing I noticed was that I have another application that uses atlas and it has an update panel with a gridview inside it as well and have never had this error popup.I have seen another problem: Outside of the gridview is a objectdatasource. If I click show smarttag on the gridview and drop down the datasource the objectdatasource is listed there to choose from. In the application that is throwing random errors I do not see the objectdatasource unless the datasource is also in the updatepanel. it will still work if outside the panel at runtime though I cannot get paging to work unless its inside the updatepanel. The other sites page works fine in the ide and when running. ? why does this application and any new applications behave this way, reference the same dll and have the same webconfig settings but things are now buggy and unstable in the ide and while running. ? ? ?