Vista Server hangs on startup


The steps detailed in the resolution of this article may result in a loss of critical data if not performed properly. Before beginning these steps, make sure all important data is backed up in the event of data loss. If you are unsure, please contact Product Support Services prior to attempting the procedure below.


When Vista Server is started the startup process just hangs.

Product Line

TAC Vista


Vista 5.x


There can be several causes for this issue.

A common issue with this situation is the Vista database has been restored from site without the Lonworks NL220 or LonMaker database.

When the Vista server is opened it is unable to contact the Lonworks database and repeated attempts cause the server to hang.


It is possible to prevent the Vista server communications as well as other parts of the Vista server communication.

Click Here to download a tool from the Community that will allow you to disable DLL files and find the cause of the issue.

If you are seeing the scenario as stated in the above cause, you would disable Option "10: Network communication" and "11: Field bus communication" in this tool then select the Update button


You must remember to enable the options once you have finished with the site database.

If you forget to do this the Vista server will not function correctly when you want to run a live database.