Autodesk Vault Thin Client Error 500

March 28, 2023 Heath White

When trying to log into the Vault Thin Client you receive the following message, even though it appears the login information was accepted.

With the newer versions of the Thin Client this error has become more common, from a variety of causes. In the case I’ll be addressing with this article, the unique behavior was that the error occurred for all users, including administrators, and all Thin Client access methods.

The other unique portion of this situation was that the Thick Clients had no issues or errors. This only affected the Thin Client access for all users and came on suddenly.

One interesting aspect of this issue was the fact that uninstalling and reinstalling the Thin Client did not correct the issue. Applying service packs also had no appreciable effect on the problem.

After some investigation, it was determined that the root cause in this instance was related to certain .dll libraries being an incorrect version. We were not able to determine how this happened with the information available to us at the time.
The example below illustrates the files for the 2022 version of Vault Professional, but this process would apply to other versions as well.

In the example above, you’ll see that there is a column displayed for the “File Version.”  That column is not displayed by default so you may need to enable it. To do so, right-click on an existing column header and choose the “More” button to bring up the “Choose Details” dialog. Select the “File Version” check box to display the desired column.


The key once you have this information displayed is to compare that with a working installation of the Thin Client. You can do this by either setting up a test environment or if you don’t have access to those resources, please reach out to our support team and we’ll be glad to assist you.

Once you determine which .dll libraries are the incorrect version, you can replace them with copies from the working installation. If that fails to resolve the issue, then you would want to investigate a complete clean uninstall and reinstall of both the Thin Client and the ADMS Console.

Please note that prior to making any significant changes to the server, ensure that you have a valid ADMS Console backup and that you communicate effectively with your user base so that the potential for data loss is minimized as much as possible.

Additional Reference:

About the Author

Heath White

Sr. Technical Support Specialist, Manufacturing

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