From cee80377be890bcc616e429da808cc9ea3807655 Mon Sep 17 00:00:00 2001
From: rendetto <66558924+rendetto@users.noreply.github.com>
Date: Thu, 17 Nov 2022 22:09:30 +0200
Subject: [PATCH] Update nurbs_birail.rst

The current master version of "NURBS Sweep" node accepts only ascending order of numbers fed into V1 and V2 (otherwise it throws an error "...Cannot solve..."). The old version was accepting non-consecutive numbers though. Lost some time figuring out what was causing the error, so I propose adding a short description in the docs.
---
 docs/nodes/surface/nurbs_birail.rst | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/docs/nodes/surface/nurbs_birail.rst b/docs/nodes/surface/nurbs_birail.rst
index a42267ebc1..2016d37c74 100644
--- a/docs/nodes/surface/nurbs_birail.rst
+++ b/docs/nodes/surface/nurbs_birail.rst
@@ -74,9 +74,10 @@ This node has the following inputs:
 * **V1**, **V2**. Values of V parameter (i.e. path curve's T parameter), at which
   profile curves must be placed for lofting. This input is available and
   mandatory if **Explicit V Values** parameter is checked. The node expects
-  number of values in this input equal to number of profile curves. For one
-  profile curve, these inputs have no meaning. V1 input is for the first path,
-  and V2 input is for the second path.
+  number of values in this input equal to number of profile curves. The values 
+  fed in V1 and V2 must be in an ascending order, e.g. (0.0, 0.333, 0.667, 1.0). 
+  For one profile curve, these inputs have no meaning. V1 input is for the first 
+  path, and V2 input is for the second path.
 * **DegreeV**. Degree of NURBS curves used to interpolate in V direction. As
   most of Sverchok numeric inputs, this input can process data with nesting
   level up to 2 (list of lists of numbers). Degree of 1 will make a "linear