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JAL-2650 configure new viewport settings before selecting view tab
[jalview.git] / src / jalview / gui / SliderPanel.java
diff --git a/src/jalview/gui/SliderPanel.java b/src/jalview/gui/SliderPanel.java
index ec53e93..2176719 100755 (executable)
--- a/src/jalview/gui/SliderPanel.java
+++ b/src/jalview/gui/SliderPanel.java
@@ -365,7 +365,7 @@ public class SliderPanel extends GSliderPanel
     }
     if (forConservation)
     {
-      if (!scheme.conservationApplied())
+      if (!scheme.conservationApplied() && sg != null)
       {
         /*
          * first time the colour scheme has had Conservation shading applied