UI Interaction freezing UI

[Aldeeg]

Hello,

I have encountered a strange problem with my current LabVIEW project. My project is a UI for a Hardware Tester including multiple DQMH Modules displayed at the same time. I am using the HSE UI Framework as a basis for this project.

Whenever I interact with e.g. an ENUM the UI freezes until I select a value from the ENUMs drop down menu. This behavior is the same both for running the program in Development and in an executable.

All background tasks (e.g. Data Acquisition or other Hardware Communication) is still getting executed, it's just the UI that will not update. The HSE UI template that served as a starting point for this project does not have this issue.

Did somebody else already encounter this problem before?

I would be happy for some suggestions as I could not find the issue. If needed, I can also post code is necessary. The whole project is using LabVIEW 2025 Q3.

Thank you & Kind Ragards

Alex 

[Yamaeda]

Do you have some Mouse click event on the Enum? Events are by default 'locking' while executing (it can be changed in the event properties) so if you have a Mouse down event it'll lock and wait.

[Aldeeg]

Thank you for your fast response. Unfortunately it is not caused by listening to an event of the control, I get the same behavior with controls that have no wiring at all and also no event listening. I also already disabled the event properties for all events to not be locking.

[PinguX]

Hello Alex,

Can you post the VI on which this behaviour happens ?

Did you also notice abnormal CPU usage during this freeze? For example, if a core was maxed out.

[altenbach]

I cannot reproduce with a simple VI. Can you post a simplified example that shows the problem?

[Yamaeda]

I remember the UI could stop if/when you opened a menu, but that's probably not related.