Solution
Note: CAR# 739464 has already been created to document and address this issue. It's expected that this issue will be fixed for LabVIEW 2019 SP1
The temporary solution for this issue is:
1. Close LabVIEW 2019 (if it is open).
2. Go to the next path in your computer:
C:\Program Files (x86)\National Instruments\LabVIEW 2019\vi.lib\express\express input
3. Copy the file named as PromptUserBlock to another location in your computer and renamed it. For example, old_PromptUserBlock.
4. Download the file attached to this document and replace the PromptUserBlock located in the express input folder.
5. Run LabVIEW 2019 again and check if the outputs of the Express VI appear this time.
If this doesn't work, these are the current workarounds when using the Prompt User for Input Express VI in LabVIEW 2019:
- Create a subVI containing the Prompt User for Input Express VI in a working previous version of LabVIEW and use this subVI in your 2019 LabVIEW application.
- Use a previous version of LabVIEW such as LabVIEW 2018 SP1 (or before)
- Follow the Creating Quality Dialog Boxes in LabVIEW tutorial to use alternative VIs in your 2019 LabVIEW application