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Site VF page submit , Causing Error 'Error occurred while loading a Visualforce page'

Hi All,

I have a strange error problem. I have cretaed force.com site setup and profile setup.

i have a url for login lets say


I opened this url in two tabs of same browser. Now i logged in from first table passing username/pwd. Its successfully logged in and landing to home page.

Now, i go to second tab and try to pass username/pwd, it gives me below error:


Error: Error occurred while loading a Visualforce page.

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This is causing only when i try to submit preopened old page, if i try to login from fresh executed login page, then everything fine. Is that something related to OLD view state or something. There is no logs in debug.


If anybody knows, please help.



Aslam Bari


Aslam, did you manage to find the reason for this? We are having the same issue when trying rerender..