Good Afternoon,

 

I've found that some of our user's are experiencing issues when they attempt to upload documents located on their internal network rather than locally on their computer.  I'm unsure on if this is a rights issue and Ajax Uploader is unable to properly gain access to the files because of this but the error they receive is:

 

 "Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation"

 

However, once they move the file locally to their machine they are able to properly upload the file.  Any idea on what could cause this?  Thank you very much.