Annual bug thread for 2020

[altenbach]

Continued from the Aug-Dec 2019 bug thread.

The monthly bug threads never got very long, so to avoid fragmentation, we are now doing one bug thread per year.

Happy New Year everyone. May you all discover the last few remaining bugs with 2020 vision!

The rules remain the same:

• Each post here should only contain a brief description of a bug, together with a link to the thread where it is being discussed.
• One post/bug!
• One bug/post!
• No discussion of bugs. All discussions of a bug must take place in the original linked thread.

[zou]

See https://forums.ni.com/t5/LabVIEW/Built-in-Mouse-Wheel-support-for-Numeric-Ring-Enum-malfunction/m-p/... 

Built-in Mouse Wheel support for Numeric/Ring/Enum Ctrl doesn't work when the ctrl is linked to connection pane.

LabVIEW 2014SP1 / 2019SP1

Windows 7 Pro

Work around: use Combo Box instead of Ring/Enum.

[cbutcher]

Creating a "VI for Override" when the parent class is a debugging-enabled PPL gives an error.

https://forums.ni.com/t5/LabVIEW/LabVIEW-2020-errors-when-creating-Override-for-a-class-in-a-PPL/m-p...

Bug number is 1047200 (replacing CAR).

Workaround is any of

a) Modify LabVIEW 2020\resource\Framework\Providers\LVClassLibrary\NewAccessors\VIRetooler\CLSUIP_CreateNewVI.vi to always error in the middle case structure

b) Don't use debugging-enabled PPLs

c) Manually override (don't use the scripting).

[McQuillan]

LabVIEW does not recognize modifications to override VIs after the initial save.

https://forums.ni.com/t5/LabVIEW/LabVIEW-2020-Not-Saving-Overrides-Correctly/m-p/4060382#M1165374

NI is aware of the issue, SLM seems to be working on it. CAR: 1057446

[EvgenKo423]

A few bugs? I have them plenty!

I still not sure which bugs should be posted here, but they're all either not-before-seen on a forum or not posted in any bug thread and not fixed for years.

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LabVIEW

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Incorrect constant size and value after multiple Undo/Redo operations

CAR #1065457.

[EvgenKo423]

Combo Box doesn't allow single item with an empty value

Still no reply to SR.

Workarounds:

• Add more items into a Combo Box;
• Use a " " (space), "." (dot) or another 1-char value as default item.