Thanks for the quick response,
I undestand your suggestion but I’m really interested in clearing just the CustomColumnFormula from the ListColumn object.
Alternatively I tried (assuming that the cells referred by each ListColumn are well known in my code), to clear the cells themselves from their values and formulae but still, when i resize the ListObject DataRange, formulae appear again.
By inspecting the excel document form inside its xml, I can see that my cells are actually without formulae (as I’ve cleared them successfully) and that the only formulae left are the ones stored in the CalculatedColumnFormula tag of ListColumn objects.
Isn’t it a bug?
Thanks in advance for the help!