Dropdown list from another table

[jfoods300]

Hello,

Does someone know why my column keep disappearing every time I add or reference a table[column] to my Valid_If?

So, my goal is to create a dropdown list of codes that is from another table[column].

I followed this tutorial https://www.youtube.com/watch?v=HreJAInAjnU but my column keeps disappearing. 

Thanks, Lon

[SkrOYC]

Could you share screenshoots where this happens

[jfoods300]

And this is after I enter the input in Valid-If

This is before I enter the input in Valid_IFHere is the source table - Productions[Lot Number]

Here are the screenshots of my project. 

[SkrOYC]

You are using a Text column instead of Enum/EnumList

[jfoods300]

Thanks for your reply.

I did try your suggestion, Enum and EnumList, but the column [Lot Number] still disappearing every time I add the expression Productions[Lot Number] 

[SkrOYC]

Please share screenshot with the new config

[Steve]

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@jfoods300 wrote:

Does someone know why my column keep disappearing every time I add or reference a table[column] to my Valid_If?

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Does the column of that other table actually contain any values? If not, you've effectively told the app there are no valid values to be input there.

[jfoods300]

Thanks. Yes, there's actually values on the table - Productions[Lot Number]. Please see my screenshots.