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Can’t calculate field to <NULL> using None

Jim_Riedmann

I’m using ArcGIS Pro 3.3.1. I have an attribute table with a date field. I want to replace some of the values in the field with <NULL>. Using the field calculator, with the Expression Type set to Python, I type None in the space for the new field value. I get Warning 003571 and the value in the table stays the same. I can’t find any way to get <NULL> into the date field. I looked at the Fields view and NULL is allowed for that field.

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Accepted answers

Eugene_Adkins

Using Field Calculator/Arcade, type "return null" and if the fields are nullable this should work.

All comments

kenbuja

That's curious, since it worked in my testing. I created a new date field, copied an existing field's dates into the records, then set them to null again. The screen image was the last step in my process.

Jim_Riedmann

That method works, thanks very much.

Jim_Riedmann

No, they are not calculated to NULL. They remain unchanged.

Bud

kenbuja

Even though you do get that warning, the date values are calculated to null.

Eugene_Adkins

Using Field Calculator/Arcade, type "return null" and if the fields are nullable this should work.

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