I have an application on a site that uses the radasync upload. It is a two part application process. Everyone fills out the first page and upon the answer of a question, it'll load the second page with a certain control. These controls all contain a rad async upload and all have the same temp folder path and have the same expiration timeout. Occasionally, in the error logs I see that some errors come with cannot find file in temp folder. I thought at first i thought that it was the expiration time out was set to 2 hours so i changed all of them to 5 hours, but that did not seem to resolve the issue as I keep receiving these messages. The application does not have a lot of questions so I do not think that it would take long to complete the application and the users should be able to complete the application before the time out expires. Could it be that since all controls are writing to the upload temp folder, that there is conflict?