Error 1556 When Using Actor Framework Library on LabVIEW

Issue Details

When launching my LabVIEW application (either in the development environment or as a built executable), I briefly see the following message during application startup. 

The following pop-up appears every time the application starts. In the development environment, it flickers quickly, and in the executable, it remains visible for about a second. 

Solution

This behavior can occur when Desktop Execution Trace Toolkit (DETT) debugging functionality is enabled through an open-source implementation of the Actor Framework. Disabling this debug trace functionality prevents the DETT components from loading during application startup.

To resolve this issue, disable DETT tracing using a Conditional disabled Symbol:

1. Open your LabVIEW project, and click on the Project option.

2. Go to Properties and then Conditional Disable Symbols.

3. Add or update the following symbol:

                   AF_DEBUG_TRACE = False

           4. Save the project.
           5. Rebuild your application.

After completing these steps, the pop-up should no longer appear when launching your application.

Additional Information

The file DETT Format.lvclass is not part of the standard LabVIEW installation or the native Actor Framework. It is associated with an open-source implementation of the Actor Framework that includes debugging and tracing features.

When upgrading LabVIEW versions, it is recommended to verify that all third-party or open-source dependencies are compatible with the new version.

If the issue persists or you suspect unintended behavior, consider reviewing or updating the open-source components used in your project.