204def cholesky(x):
205 """Cholesky decomposition of Obs valued matrices."""
206 if any(isinstance(o, CObs) for o in x.ravel()):
-207 raise Exception("Cholesky decomposition is not implemented for CObs.")
+207 raise NotImplementedError("Cholesky decomposition is not implemented for CObs.")
208 return _mat_mat_op(anp.linalg.cholesky, x)
diff --git a/docs/pyerrors/misc.html b/docs/pyerrors/misc.html
index cfacc211..c6e99c87 100644
--- a/docs/pyerrors/misc.html
+++ b/docs/pyerrors/misc.html
@@ -253,7 +253,7 @@