# How to check if a parameter value is read only? (not the parameter itself)

**URL:** <https://forum.dynamobim.com/t/how-to-check-if-a-parameter-value-is-read-only-not-the-parameter-itself/46128>\
**Category:** Revit\
**Created:** [January 30, 2020, 8:52am UTC](https://forum.dynamobim.com/t/how-to-check-if-a-parameter-value-is-read-only-not-the-parameter-itself/46128 "2020-01-30T08:52:39Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![NurlanAdsk](https://avatars.discourse-cdn.com/v4/letter/n/22d042/32.png) [@NurlanAdsk](https://forum.dynamobim.com/u/NurlanAdsk)\
**Post date:** [January 30, 2020, 8:52am UTC](https://forum.dynamobim.com/t/how-to-check-if-a-parameter-value-is-read-only-not-the-parameter-itself/46128/1 "2020-01-30T08:52:39Z")

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Hello!  
There is a shared parameter, which is filled with Dynamo. In some elements, these values are calculated automatically within the family and are read-only. The task is to filter out such elements or families.

Please help!

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**Author:** ![infeeeee](https://avatars.discourse-cdn.com/v4/letter/i/e480ec/32.png) [@infeeeee](https://forum.dynamobim.com/u/infeeeee)\
**Post date:** [January 30, 2020, 11:19am UTC](https://forum.dynamobim.com/t/how-to-check-if-a-parameter-value-is-read-only-not-the-parameter-itself/46128/2 "2020-01-30T11:19:16Z")

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Parameter.IsReadOnly should report this correctly:

 ![kép](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/8/5858f3f56b0b09767fc3c4a7d71781b5193e1f7d.png)  
In this example one of them assigned in the family (true) the other one is added only in the project

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<div class="post-metadata">

**Author:** ![NurlanAdsk](https://avatars.discourse-cdn.com/v4/letter/n/22d042/32.png) [@NurlanAdsk](https://forum.dynamobim.com/u/NurlanAdsk)\
**Post date:** [January 30, 2020, 12:07pm UTC](https://forum.dynamobim.com/t/how-to-check-if-a-parameter-value-is-read-only-not-the-parameter-itself/46128/3 "2020-01-30T12:07:16Z")

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Thank you @infeeeee  
it works!