Problems where Excel information is not automatically entered in parameters

I’m a beginner studying Dynamo.
I want to put the information in Excel into Revit Parameters, but I can’t solve the problem here.
I would like to have RM in Excel automatically enter FL information by mapping it to Parameter RM information.
Please help me.
Thank you.
Revit Parameter


error-1 error-2 error-3

Hi @gkdkdo

Could you show us output values of Flatten node?

Hello, @kulkul.
I will also attach the Excel image.
The empty space null value and Excel information are represented.
Thank you for your answer.

Hi @gkdkdo ,
Try this Excel to Revit.dyn (31.9 KB)