I am trying to section af simple part, consisting of a tube with an internal groove following a helix.

If the helix runs clockwise SolidWorks can't section it using the right plane. Instead it displays the following message:

"The model could not be probably sectioned by the section line.

Please check that the section line cuts through the model."

However, if i set the exact same helix to run counterclockwise it's not a problem at all, and SolidWorks will section it probably.

The error carries on to drawings and assemblies, e.g. it can't section them either.

I hope you can help me find a solution.

Part file is attached.

Regards

Mads Eckert

Aarhus University School of Engineering, Denmark