# dateDiff Error\_ExpressionEval

**URL:** <https://forum.inductiveautomation.com/t/datediff-error-expressioneval/54082>\
**Category:** Ignition\
**Created:** [December 14, 2021, 6:15am UTC](https://forum.inductiveautomation.com/t/datediff-error-expressioneval/54082 "2021-12-14T06:15:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Kari\_Riitakangas](https://avatars.discourse-cdn.com/v4/letter/k/f14d63/32.png) [@Kari\_Riitakangas](https://forum.inductiveautomation.com/u/Kari_Riitakangas)\
**Post date:** [December 14, 2021, 6:15am UTC](https://forum.inductiveautomation.com/t/datediff-error-expressioneval/54082/1 "2021-12-14T06:15:10Z")

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Hi, little problem with datediff, error claims null in first argument. If i check with plain …/Table.props… there is valid value.

 ![ignition](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/c/0c0564342d84c7162117de4a947163a10710d944.jpeg)