diff --git a/src/main/java/neqsim/thermodynamicOperations/ThermodynamicOperations.java b/src/main/java/neqsim/thermodynamicOperations/ThermodynamicOperations.java
index 03dd936493..1be2bc115f 100644
--- a/src/main/java/neqsim/thermodynamicOperations/ThermodynamicOperations.java
+++ b/src/main/java/neqsim/thermodynamicOperations/ThermodynamicOperations.java
@@ -1794,6 +1794,10 @@ public void setResultTable(String[][] resultTable) {
    * </p>
    */
   public void display() {
+    if (resultTable == null) {
+      return;
+    }
+
     JFrame dialog = new JFrame("System-Report");
     Container dialogContentPane = dialog.getContentPane();
     dialogContentPane.setLayout(new BorderLayout());