diff --git a/rosetta-source/src/main/rosetta/observable-common-func.rosetta b/rosetta-source/src/main/rosetta/observable-common-func.rosetta
index 51120511d5..3d454b4efa 100644
--- a/rosetta-source/src/main/rosetta/observable-common-func.rosetta
+++ b/rosetta-source/src/main/rosetta/observable-common-func.rosetta
@@ -42,3 +42,4 @@ func CashPriceQuantityNoOfUnitsTriangulation: <"Data rule to check the relations
     set success:
         if cashPrice exists and noOfUnits exists and notional exists
         then cashPrice * noOfUnits = notional
+        else True
diff --git a/rosetta-source/src/test/java/cdm/observable/common/functions/CashPriceQuantityNoOfUnitsTriangulationTest.java b/rosetta-source/src/test/java/cdm/observable/common/functions/CashPriceQuantityNoOfUnitsTriangulationTest.java
index 958b16dd32..0864e86657 100644
--- a/rosetta-source/src/test/java/cdm/observable/common/functions/CashPriceQuantityNoOfUnitsTriangulationTest.java
+++ b/rosetta-source/src/test/java/cdm/observable/common/functions/CashPriceQuantityNoOfUnitsTriangulationTest.java
@@ -75,6 +75,6 @@ void shouldReturnSuccessNotApplicableBecauseNoOfUnitsNotDefined() throws IOExcep
 				.collect(Collectors.toList());
 		Boolean notDefined = func.evaluate(quantity, price);
 
-		assertNull(notDefined);
+		assertTrue(notDefined);
 	}
 }