"Unable to Load Configuration" Error for Periodic I/O Server in Distributed System Manager

Issue Details

When using my Periodic I/O Servers, it shows the following on Distributed System Manager: Error code 1125 and error message: Unable to load configuration. This happens after I migrated my LabVIEW project from 2019 to 2023.

The error looks like this:

Solution

Error 1125 indicates that the file version is later that current LabVIEW version. The issue arises due to version incompatibility between the LabVIEW project files and the LabVIEW version being used.

Follow the steps below to fix it:

1. Navigate to C:\Program Files (x86)\National Instruments\Shared\DSC\Custom VI Periodic Server.
2. Delete the files in this directory that are related to the server with the issue.
3. Rebuild the Periodic I/O server from your LabVIEW project. 

You may them get Error 1003 with error Message: "The VI is not executable. This error may occur because the VI is either broken or contains a subVI that LabVIEW cannot locate. Select File>>Open to open the VI and verify that you can run it." It indicates that the VI is not executable, which can be due to broken VIs or missing subVIs.

Steps to resolve:

1. Remove Server from Project:
   • Remove the Periodic I/O server from the project.
2. Disconnect Base VI:
   • Disconnect the base.vi from the library by moving it outside its library in the project tree.
3. Rebuild Server:
   • Rebuild the server from the disconnected base.vi.

Alternative Fix:

• • Verify that the VIs under C:\Program Files (x86)\National Instruments\Shared\DSC\Custom VI Periodic Server\25.0 related to your server are all able to run (i.e., they do not have a broken arrow).