diff --git a/copasi/UI/CQCompartment.cpp b/copasi/UI/CQCompartment.cpp
index a8b2de2dc1..a06cb7e4bc 100644
--- a/copasi/UI/CQCompartment.cpp
+++ b/copasi/UI/CQCompartment.cpp
@@ -122,6 +122,10 @@ void CQCompartment::slotBtnCopy() {}
 
 void CQCompartment::copy()
 {
+
+  if (!mpObject)
+    return;
+
   CModel * pModel = mpDataModel->getModel();
   CModelExpansion cModelExpObj = CModelExpansion(pModel);
   CModelExpansion::SetOfModelElements compartmentObjectsToCopy;
diff --git a/copasi/UI/CQEventWidget1.cpp b/copasi/UI/CQEventWidget1.cpp
index 8bbc44a67a..69f5df5b0f 100644
--- a/copasi/UI/CQEventWidget1.cpp
+++ b/copasi/UI/CQEventWidget1.cpp
@@ -118,6 +118,9 @@ void CQEventWidget1::slotBtnNew()
 
 void CQEventWidget1::slotBtnCopy()
 {
+  if (!mpDataModel || !mpObject)
+    return;
+
   std::string name = "event";
   int i = 1;
 
diff --git a/copasi/UI/CQModelValue.cpp b/copasi/UI/CQModelValue.cpp
index 5d063f1336..fb17dcab7f 100644
--- a/copasi/UI/CQModelValue.cpp
+++ b/copasi/UI/CQModelValue.cpp
@@ -97,6 +97,9 @@ void CQModelValue::slotBtnNew()
 
 void CQModelValue::slotBtnCopy()
 {
+  if (!mpDataModel || !mpObject)
+    return;
+
   std::string name = "quantity";
   int i = 1;