This isn't an exception thrown by the RadUpload
or the RadUploadHandler
. Instead it rather indicates a windows file selection issue. However as we weren't able to reproduce it locally, we're not sure what might be causing it on your machine.
Also, as the RadUpload
uses the OpenFileDialog
internally, you can try to select multiple files in a sample Silverlight application using the OpenFileDialog
to see if the exception is raised with it as well.
If you manage to reproduce it in a sample solution on another machine as well, you can send this solution over and we'll test it on our side as well.
Pavel R. Pavlov
the Telerik team