Hi,
      
      I have an issue with opening an ods-file (attached). The following
      error is thrown when trying to open the file (either via GUI or
      script):
      
      
      
      
    Interestingly, the xlsx-equivalent
      does not provoke an error and gets loaded properly.
      
      I am using a recent gretl snapshot from last week on Ubuntu.
      
      Just another minor thing: While drag-and-drop works for the xls(x)
      file type, it fails for ods. Might be a bug or simply not
      supported (which would be totally fine).
      
      Best,
      Artur