diff --git a/PROMS/Volian.Controls.Library/DisplaySearch.cs b/PROMS/Volian.Controls.Library/DisplaySearch.cs
index 91d83845..4cbe1abe 100644
--- a/PROMS/Volian.Controls.Library/DisplaySearch.cs
+++ b/PROMS/Volian.Controls.Library/DisplaySearch.cs
@@ -160,12 +160,14 @@ namespace Volian.Controls.Library
 
 		void tabSearchTypes_SelectedTabChanged(object sender, TabStripTabChangedEventArgs e)
 		{
+			btnSearch.Enabled = true;
 			if (e.NewTab == tabROSearch)
 			{
 				LoadROComboTree();
 			}
 			else if (e.NewTab == tabTranSearch)
 			{
+				btnSearch.Enabled = (cbxTranCategory.Items.Count > 0); // B2017-038 disable search button if no format selected
 				//enable-disable doc version nodes based on version type if selected
 				if (cbxTranVersion.SelectedIndex > -1)
 				{
@@ -263,6 +265,7 @@ namespace Volian.Controls.Library
 				cbxTranCategory.SelectedIndex = 0;
 			}
 			#endregion
+			btnSearch.Enabled = true; // B2017-038 enable search button if when a format selected
 		}
 		FormatVersionList myFormatVersionList;
 		private void LoadSearchTextListBox()