Error: ‘Property name not recognised: …’

This must be the most common error I get in PropertyWizard. It means that there isn’t a property called ‘whatever’ on the element. And the key to fixing the problem is to look carefully at the name PropertyWizard thinks it’s looking for (‘whatever’), and ask yourself if that’s really the property name you want?

Often, I find that I’ve mis-spelled the property name – In this case, I’ve typed ‘Cill’ instead of ‘Sill’:

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PropertyWizard Help File

There is a comprehensive help file for PropertyWizard. It contains a ‘getting started’ tutorial and a complete reference to the formula language. 

The App Store installer places a copy of the help file on your hard disk here:


And you can download a copy directly from the website here:

PropertyWizard Help

How to use Property Names that contain spaces (and other things)

Property names can contain spaces and other special characters.

To use those properties in your PropertyWizard formulas, enclose the property name in square brackets, like this: [Fire Rating]

Otherwise, PropertyWizard will show an error message: the name that PropertyWizard identifies in the error message will just be the first part of the name you intended.

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How to install Revit Lookup

Post updated 2 November 2021 with the latest links

Revit Lookup is a free, open-source add-in for Revit, which you can use to explore the Revit API.

You will find it invaluable if you are using Dynamo or pyRevit, and also if you are using my Revit Add-in, PropertyWizard.

In this post, I am going to explain how to download and install Revit Lookup, and then in future posts I’ll explain how to get started with Revit Lookup, how to use it in Dynamo and pyRevit, and how to use Revit Lookup with PropertyWizard.

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