diff --git a/src/main/java/com/supervision/police/service/impl/ModelServiceImpl.java b/src/main/java/com/supervision/police/service/impl/ModelServiceImpl.java
index 6b14b9e..0865069 100644
--- a/src/main/java/com/supervision/police/service/impl/ModelServiceImpl.java
+++ b/src/main/java/com/supervision/police/service/impl/ModelServiceImpl.java
@@ -370,7 +370,7 @@ public class ModelServiceImpl implements ModelService {
                 }
             }
         }
-        if (CalculationUtil.evaluateExpression(String.valueOf(count), ruleCondition.getOperator(), ruleCondition.getValue())) {
+        if (StringUtils.isNotEmpty(ruleCondition.getOperator()) && StringUtils.isNotEmpty(ruleCondition.getValue()) && CalculationUtil.evaluateExpression(String.valueOf(count), ruleCondition.getOperator(), ruleCondition.getValue())) {
             flag = true;
         }
         modelAtomicResultService.saveOrUpdate(atomicResult);