# Instance parameter error

**URL:** <https://forum.dynamobim.com/t/instance-parameter-error/48209>\
**Category:** Uncategorized\
**Created:** [March 18, 2020, 2:20pm UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209 "2020-03-18T14:20:37Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![simoneavellini](https://avatars.discourse-cdn.com/v4/letter/s/ee7513/32.png) [@simoneavellini](https://forum.dynamobim.com/u/simoneavellini)\
**Post date:** [March 18, 2020, 2:20pm UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209/1 "2020-03-18T14:20:37Z")

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Hello,  
Using Rhythm to retrieve an instance parameter, I get this error.  
Any idea?  
Warning: Elements.GetParameterValueByNameTypeOrInstance operation failed.  
The call is ambiguous between the following methods or properties: ‘Revit.Elements.ElementWrapper.Wrap(Autodesk.Revit.DB.CurtainSystem, bool)’ and ‘Revit.Elements.ElementWrapper.Wrap(Autodesk.Revit.DB.FamilyInstance, bool)’

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/e/9/e9c9525d304acce9da0a208f2c115252d8cd1301.png)

Any alternative to get/set an instance parameter?  
Thanks  
Simone

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**Author:** ![Kulkul](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kulkul/32/49801_2.png) [@Kulkul](https://forum.dynamobim.com/u/Kulkul)\
**Post date:** [March 18, 2020, 3:11pm UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209/2 "2020-03-18T15:11:56Z")

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Hi @simoneavellini

Which Rhythm version you’re using? Make sure you’re using latest Rhythm package.

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**Author:** ![SeanP](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/seanp/32/42560_2.png) [@SeanP](https://forum.dynamobim.com/u/SeanP)\
**Post date:** [March 18, 2020, 3:31pm UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209/3 "2020-03-18T15:31:28Z")

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Can you show the list of elements you are feeing the node? Looks like it may be an issue with the elements coming in.

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**Author:** ![simoneavellini](https://avatars.discourse-cdn.com/v4/letter/s/ee7513/32.png) [@simoneavellini](https://forum.dynamobim.com/u/simoneavellini)\
**Post date:** [March 19, 2020, 9:15am UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209/4 "2020-03-19T09:15:55Z")

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The Latest Rhythm 2020.2.13 on Dynamo 1.3 & Revit 2019

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**Author:** ![simoneavellini](https://avatars.discourse-cdn.com/v4/letter/s/ee7513/32.png) [@simoneavellini](https://forum.dynamobim.com/u/simoneavellini)\
**Post date:** [March 19, 2020, 9:18am UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209/5 "2020-03-19T09:18:39Z")

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It is a Structural Column Family (Revit 2019 - Attached )  
I would like to read the Dimensions Parameters shown below  
 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/8/5/85a0654130ff603547404b1a302aaedc0c0c4e29.png)  
I am not finding any solution …[MB\_Frame\_Vertical.rfa](https://forum.dynamobim.com/uploads/short-url/y74dwG11uh3txkHuUhAHo9k5i6y.rfa) (332 KB)  
Many thanks

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**Author:** ![beda\_bar](https://avatars.discourse-cdn.com/v4/letter/b/4da419/32.png) [@beda\_bar](https://forum.dynamobim.com/u/beda_bar)\
**Post date:** [October 9, 2020, 9:23pm UTC](https://forum.dynamobim.com/t/instance-parameter-error/48209/6 "2020-10-09T21:23:53Z")

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I am having a similar problem to get parameters from Rooms and Areas