TT toolbox - Could not open excel error

Hi @emilpoulsen

I’m trying to use the TT Toolbox plug-in to export data to a formatted Excel spreadsheet. However, I am getting this error:

1. Could not open excel. Try opening excel manually and running this component again.

I’ve tried manually launching the file and then rerunning the component but it didn’t work. I was trying to run in Rhino.Inside Revit but even trying in standard Rhino isn’t working (refer attached GH file).

Any ideas what is happening?

Export to (18.4 KB)


Hi Paul - have you tried with any of the other plug-ins that interface Excel?

@wim I can’t even get it to work with Lunchbox. I get an error:

System.NullReferenceException: Object reference not set to an instance of an object.
   at LunchBox.WF_ExcelWriteNew.SolveInstance(IGH_DataAccess DA)

Does this file work for you? (15.4 KB)

I tested the TT Toolbox plugin excel export about 1 month ago and it worked. Have there been any updates to Rhino in the past month that could have affected this?

Even trying to read data doesn’t work:

It’s more likely something happens on the Excel end.

Does the file work for you?

I’m wondering if it has anything to do with sharing/cloud based excel files. However, I haven’t shared this document so not sure why it would be failing.


You can try like this:

I have the same issue and it works for me.


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I tried Quick repair and it didn’t work for me.
I noticed that my Office Apps are 32 bit running on 64bit Windows. When I installed 64 Bit Office 365 Apps, problem solved. Now both lunch box and TT toolbox Excel tools are working.