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BUG: DatePicker.SelectedDate not working for an older app

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Posted on by WhatsHisName

I have an older PowerApp (written 3-4years ago). Its been working fine, without issue for a long time.

I opened the app to work on it, and one of the Submit buttons has a red X on it. There does not seem to be an issue with the actual submit process (I would have heard about it because the app is actively used by ~300 people).

The error shows that the DatePicker control is not accepting the .SelectDate property:

"Invalid argument type. Expecting one of the following: Boolean, Number, Text, OptionSetValue."

1. Why is this error occurring?

2. How do I fix the error?

Thank you

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Building Power Apps

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cmitchener on at

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Would you be willing to post that whole block of code? It may be easier to troubleshoot, it looks like the issue is with the entire construction.

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BCBuizer 22,833 Super User 2026 Season 2 on at

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Hi @WhatsHisName ,

The combination of SelectedDate and || is what is causing the issue. In case you want a condition to check if multiple arguments are blank, you need to use an IsBlank for each of them:

IsBlank(evaluationDate_datePicker.SelectedDate) || IsBlank( etc.

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cmitchener on at

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@BCBuizer is correct, or if you want it to all be in one function you could just use a regular Or:

IsBlank(Or(evaluationDate_datePicker.SelectedDate, item2, item3))

It's really just a matter of preference

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WhatsHisName 42 on at

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Hm... I'm not sure of that assertion.

The issue is with the DisplayMode property. There are multiple `||` Or's that are working just fine. Its only this one.

If I comment out the offending line, the code works just fine.

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BCBuizer 22,833 Super User 2026 Season 2 on at

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Hi @WhatsHisName ,

In any case you need to isolate that particular condition to get your code to work.

Including a ComboBox.SelectedItems in the code gives the same error. It's as the error says: only those types allowed.

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WhatsHisName 42 on at

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This must have been a change in PowerApps since the app was created because the DisplayMode was at one time working.
Thanks for peeking at the issue.

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