I’m trying to make an Excel schedule in which I can change the model number of a piece of equipment(heat pump in this case), then use Dynamo to push that change to Revit. We have a heat pump family that has different model numbers for different family types. I’m able to create the excel spreadsheet using Element.GetParameterValueByName, however when using Element.SetParameterByName to bring it back in it says “The parameter’s storage type is not a string.” even though I’m using the exact same string I used in GetParameter. Below is what I have so far. I’m using the same format to change equipment CFM and equipment numbers, both of which are instance parameters. Can anyone help?