diff --git a/src/main/java/no/nibio/vips/ipmdecisions/DataTransformer.java b/src/main/java/no/nibio/vips/ipmdecisions/DataTransformer.java
index 64dae847ae8c8c4908d2b8fd2e455740cb8cdb66..cf746b4e7dfd1753af5a38dab35d057286d34871 100644
--- a/src/main/java/no/nibio/vips/ipmdecisions/DataTransformer.java
+++ b/src/main/java/no/nibio/vips/ipmdecisions/DataTransformer.java
@@ -142,7 +142,7 @@ public class DataTransformer {
                 data[row.intValue()][i] = null;
                 if(VIPSResultParameters[i] != null)
                 {
-                    if(r.getAllValues().get(VIPSResultParameters[i]) != null)
+                    if(r.getAllValues().get(VIPSResultParameters[i]) != null && ! r.getAllValues().get(VIPSResultParameters[i]).toLowerCase().equals("null"))
                     {
                         data[row.intValue()][i] = Double.valueOf(r.getAllValues().get(VIPSResultParameters[i]));
                     }