Describe the bug
I have a dfsu file of a friction map, which I would like to open in mikeio. I get the following error messages:

The file is accepted by a MIKE 21 HD run and in the data utility it looks like this:

What I tried
I did create, save and reload a mikeio.dataset with EUMType.Mannings_M, EUMUnit.meter_pow__1_per_3__per_sec without any problems. I did then also open this 2nd dfsu file in the data utility and could not find a difference.

System information:

• Python 3.11.0
• MIKE IO version 1.2.4