UnicodeDecodeError using mikeio.Mesh() command

[RenewAndPlay]

Hi,

I recently got windows 11, before that I had W10. I have now run into problems with encoding when trying to read a mesh file by the command mikeio.Mesh("filename"). I don't get the same problems when just reading the dfsu file by the command mikeio.read("filename").

import mikeio

filepath_mean = "Hm0_mean.dfsu"
Mesh = mikeio.Mesh(filepath_mean )

Then I would get the error

---------------------------------------------------------------------------
UnicodeDecodeError                        Traceback (most recent call last)
File c:\Users\ashn\OneDrive - COWI\Desktop\Temp\ENERGINET\COWI_Sharing\EIBS_SW.py:[1](file:///C:/Users/Desktop/Temp/Sharing/EIBS_SW.py:1)
----> 1 Msh_Mean = mikeio.Mesh(filepath_mean)

File c:\PythonEnvir\Metocean\Lib\site-packages\mikeio\dfsu\_mesh.py:46, in Mesh.__init__(self, filename)
     [44](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:44) def __init__(self, filename: str | Path) -> None:
---> [46](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:46)     self.geometry: GeometryFM2D = self._read_header(filename)
     [47](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:47)     self.plot = self.geometry.plot

File c:\PythonEnvir\Metocean\Lib\site-packages\mikeio\dfsu\_mesh.py:50, in Mesh._read_header(self, filename)
     [49](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:49) def _read_header(self, filename: str | Path) -> GeometryFM2D:
---> [50](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:50)     msh = MeshFile.ReadMesh(filename)
     [52](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:52)     node_table = get_nodes_from_source(msh)
     [53](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikeio/dfsu/_mesh.py:53)     el_table = get_elements_from_source(msh)

File c:\PythonEnvir\Metocean\Lib\site-packages\mikecore\MeshFile.py:408, in MeshFile.ReadMesh(filename)
    [406](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:406)     raise FileNotFoundError("File {0} not found".format(filename))
    [407](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:407) file = MeshFile()
--> [408](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:408) file.Read(filename)
    [409](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:409) return file

File c:\PythonEnvir\Metocean\Lib\site-packages\mikecore\MeshFile.py:209, in MeshFile.Read(self, filename)
    [200](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:200) """Read .mesh file and load all data.
    [201](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:201) 
    [202](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:202) If an element specifies a node number of zero, that node number is ignored, and
   (...)
    [205](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:205) and triangular elements specifies the last node as zero.
    [206](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:206) """
    [207](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:207) with open(filename ,'r', encoding='utf-8') as reader:
    [208](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:208)     # read header line
--> [209](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:209)     line = reader.readline().lstrip()
    [210](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:210)     if line is None:
    [211](file:///C:/PythonEnvir/Metocean/Lib/site-packages/mikecore/MeshFile.py:211)         raise IOError("Can not load mesh file. File is empty")

File <frozen codecs>:322, in decode(self, input, final)

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe7 in position 82: invalid continuation byte

Do you have any ideas on what can be done, so that I can read the mesh of the dfsu files?

Br Andreas

[ecomodeller]

If you open a dfsu file, you can get the mesh from the geometry property. Which can be converted to a mesh file, using to_mesh.