Revit Interoperability Tools, Parameter mapping is not working

[Christian.Murphy7G2FE]

Hi,

I am trying to use the Revit Interoperability Tools to populate COBie fields using shared parameters already within my family / project. For example - I would like the COBie.Component.Length to be populated by my Door Frame Width shared parameter. I have set it up using the Parameter Mappings tool as shown below, but the COBie.Component.Length field remains blank.

I'm sure I am missing a simple step here, but I cannot get this to populate. I have tried a few different parameters and none seem to work for me. Thanks in advance for your help.

Parameter Mappings set up

Field is empty

Parameter from family

[barthbradley]

Is the custom parameter mapped to the same Revit categories as the default? 

[Christian.Murphy7G2FE]

Hi, the custom parameter is a shared parameter (Door Frame Width) within a door family that I have loaded into the project. It is a reporting parameter that reports the width of each door frame.

I can create my own door schedule in Revit and this field is populated as expected, but this does not transfer over to the Cobie.Component.Length field.

I'm not sure if this answers your question, but let me know if not.

Thanks 

[JasonKunkel · Accepted solution]

The Parameter Mapping can be confusing. It does NOT fill in the "COBie" parameter. It essentially replaces it.

On export, the COBie Extension by default looks at its own parameters to populate the Excel file. In this case, it would look to Cobie.Component.Length. When you set up Parameter Mapping, you are telling the COBie Extension what parameter to export from. So in your case specifically the values from Door Frame Width will be exported, not from Cobie.Component.Length. Basically, ignoring the "default" COBie parameter.

Not seeing anything in Cobie.Component.Length is expected. You should export to Excel to check that it is reading your mapped parameter correctly.

Similarly, the export does not rely on the schedules in the model. Those schedules are there for reference and easier updating.

[Christian.Murphy7G2FE]

Hi Jason,

Thank you very much for this explanation - as you said, once I exported the COBie sheets to Excel everything that I had mapped was shown correctly . It just did not show it within the COBie schedules within Revit, which is where I got confuised, but all clear now.