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WCrihfield
in reply to: MESZ.CIDEON

Hi @MESZ.CIDEON.  This has been a fairly common issue in the past.  They introduced new functionality for how Inventor interacts with (or without) Excel in Inventor 2021 (and newer), but there were a couple common things folks did before that.  Here are some links on the subject:

Embedded excel sheet not supported on this platform 

Autodesk Inventor: Long waiting time when working with threads and holes 

Inventor files are too large and take a long time to open 

Inventor 2018 Performance on Windows 10 when assembly has linked spreadsheet. 

Error "excel not registered" is received when trying to create a hole with Inventor 2016 

Thread operations do not work in Inventor after installing Microsoft security updates - KB4041681 (W... 

You will notice one thing in common in each of these cases...they are all recommended to use the UseLibXL system variable.  I don't know if this will help in your case or not, but it might.

Wesley Crihfield

EESignature

(Not an Autodesk Employee)