1 files changed, 3 insertions, 0 deletions

diff --git a/OpenSim/Grid/UserServer.Modules/UserManager.cs b/OpenSim/Grid/UserServer.Modules/UserManager.cs
index c6c3a1a..1f4b07d 100644
--- a/OpenSim/Grid/UserServer.Modules/UserManager.cs
+++ b/OpenSim/Grid/UserServer.Modules/UserManager.cs
@@ -248,6 +248,9 @@ namespace OpenSim.Grid.UserServer.Modules
             {
                 string query = (string) requestData["avatar_name"];
 
+                if (null == query)
+                    return CreateUnknownUserErrorResponse();
+
                 // Regex objAlphaNumericPattern = new Regex("[^a-zA-Z0-9]");
 
                 string[] querysplit = query.Split(' ');