Problem
When users are merging large amounts of data, such as a model to make a composite document, the merge fails after a period of time with a file not found error.
Cause
The cause can be that the license is timing out while the merge process is still in progress. As a result, any files placed in the temporary viewdirectory are removed when the license is checked back in. The merge process will then display the file not found error.
Solution
You can control the license timeout using the LicenseTimeoutSeconds site settings property in Server Manager. This determines the length of time that a client session can remain inactive before the license for that session is released.
The property is set to 900 seconds by default, the timeout then occurs after 900 seconds (15 minutes) of inactivity. Increasing the timeout by a factor of 10 to cover the merge process for large amounts of data can resolve this issue.