Astrid Elke Witte 

Did you check this option before creating your project?

Hi Paul, Thank you for your reply. Sadly, this did not work. I selected the option highlighted before setting up the new project (I actually wanted to re-use the existing, old project, but realised that I shouldn't when you posted) so I set up a new project, which gave the same error message upon importing the IDML file (it is actually an IDML file, only Studio treats it as an ICML file). Best regards.

Hi Paul, Thank you for your reply. Sadly, this did not work. I selected the option highlighted before setting up the new project (I actually wanted to re-use the existing, old project, but realised that I shouldn't when you posted) so I set up a new project, which gave the same error message upon importing the IDML file (it is actually an IDML file, only Studio treats it as an ICML file). Best regards.

Astrid Elke Witte 

Astrid Elke Witte said:

(it is actually an IDML file, only Studio treats it as an ICML file)

Really?  I think you need to look at that.  There are separate filetype foe IDML and ICML, they are not the same thing.  ICML files are handled with InCopy and IDML with InDesign.