From cb63eb3ee88ba30c5d278bba9147e8cdb59bf59e Mon Sep 17 00:00:00 2001
From: Danny Auble <da@schedmd.com>
Date: Fri, 27 Jan 2012 15:02:35 -0800
Subject: [PATCH] BGQ - better debug.

---
 src/plugins/select/bluegene/ba_bgq/block_allocator.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/plugins/select/bluegene/ba_bgq/block_allocator.c b/src/plugins/select/bluegene/ba_bgq/block_allocator.c
index aabd126013b..d59aa4d7575 100644
--- a/src/plugins/select/bluegene/ba_bgq/block_allocator.c
+++ b/src/plugins/select/bluegene/ba_bgq/block_allocator.c
@@ -618,7 +618,10 @@ extern int check_and_set_mp_list(List mps)
 				 & BG_SWITCH_CABLE_ERROR_FULL) {
 				error("check_and_set_mp_list: Somehow we got "
 				      "a switch with an error set in it.  "
-				      "This should never happen.");
+				      "This should never happen except "
+				      "on a system with missing cables such "
+				      "as a half rack system. %u",
+				      ba_switch->usage);
 				continue;
 			}
 
-- 
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