From 6950a991624ebf77c3a67bcd9c8bc8c54db3d6d2 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Wed, 11 Jan 2017 19:49:58 -0500
Subject: [PATCH] Revert "remove obsolete warning about fix rigid image flag
 restrictions"

This reverts commit 51e52b477a51614fc24f85aff1cb222e2fa1db89.
---
 doc/src/fix_spring.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/doc/src/fix_spring.txt b/doc/src/fix_spring.txt
index 014a43aacc..1d0bd47148 100644
--- a/doc/src/fix_spring.txt
+++ b/doc/src/fix_spring.txt
@@ -89,7 +89,11 @@ NOTE: The center of mass of a group of atoms is calculated in
 group can straddle a periodic boundary.  See the "dump"_dump.html doc
 page for a discussion of unwrapped coordinates.  It also means that a
 spring connecting two groups or a group and the tether point can cross
-a periodic boundary and its length be calculated correctly.
+a periodic boundary and its length be calculated correctly.  One
+exception is for rigid bodies, which should not be used with the fix
+spring command, if the rigid body will cross a periodic boundary.
+This is because image flags for rigid bodies are used in a different
+way, as explained on the "fix rigid"_fix_rigid.html doc page.
 
 [Restart, fix_modify, output, run start/stop, minimize info:]
 
-- 
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