error: value normal is not a member of breeze.linalg.DenseVector[Double]

This error message is indicating that you are trying to access a member called "normal" on an object of type breeze.linalg.DenseVector[Double], but this member does not exist on that type.

Without more context or code to review, it's difficult to provide a more specific explanation of what might be causing this issue. However, some possible causes could include:

- You may have misspelled the member name, or it may be defined on a different type.
- The object you are trying to access may not actually be a DenseVector[Double], but some other type that does not have a member called "normal".
- There may be a problem with your import statements or dependency setup, causing a missing member or type definition.

To resolve this error, you will need to review your code and ensure that you are accessing the correct member on the correct object. If you are still having trouble, you may need to provide additional context or seek further assistance from a colleague or online community.