diff --git a/src/main/java/com/eactive/eai/custom/message/StandardMessageCoordinatorDJB.java b/src/main/java/com/eactive/eai/custom/message/StandardMessageCoordinatorDJB.java
index 47b3d71..eb2ef73 100644
--- a/src/main/java/com/eactive/eai/custom/message/StandardMessageCoordinatorDJB.java
+++ b/src/main/java/com/eactive/eai/custom/message/StandardMessageCoordinatorDJB.java
@@ -209,10 +209,10 @@ public class StandardMessageCoordinatorDJB extends DefaultStandardMessageCoordin
             msgList.setSize(1);
             LinkedHashMap<String, StandardItem> row = msgList.getArrayChilds(0, true);
             if (row != null) {
-                if (row.containsKey("outp_msg_cd"))   row.get("outp_msg_cd").setValue(siteErrCode);
-                if (row.containsKey("outp_msg_ctnt")) row.get("outp_msg_ctnt").setValue(siteErrMsg);
-                if (row.containsKey("outp_msg_desc")) row.get("outp_msg_desc").setValue(siteErrDesc);
-                if (row.containsKey("err_occu_loct")) row.get("err_occu_loct").setValue(errCode);
+                setIfPresent(row, "outp_msg_cd",   siteErrCode);
+                setIfPresent(row, "outp_msg_ctnt", siteErrMsg);
+                setIfPresent(row, "outp_msg_desc", siteErrDesc);
+                setIfPresent(row, "err_occu_loct", errCode);
             }
         }
 
@@ -259,6 +259,17 @@ public class StandardMessageCoordinatorDJB extends DefaultStandardMessageCoordin
     // private helpers
     // ----------------------------------------------------------------
 
+    /**
+     * row 에 해당 키의 StandardItem 이 존재할 때만 값을 설정한다.
+     * containsKey + get 이중 조회를 제거하고 널 역참조 가능성을 차단한다.
+     */
+    private void setIfPresent(LinkedHashMap<String, StandardItem> row, String key, String value) {
+        StandardItem item = row.get(key);
+        if (item != null) {
+            item.setValue(value);
+        }
+    }
+
     private void resolveCallPropRefValues(StandardMessage standardMessage, Properties prop) {
         if (prop == null) return;
         resolveCallPropInChilds(standardMessage.getChilds(), prop);
@@ -275,7 +286,8 @@ public class StandardMessageCoordinatorDJB extends DefaultStandardMessageCoordin
                 if (m.matches()) {
                     String key        = m.group(1);
                     String defaultVal = m.group(2) != null ? m.group(2) : "";
-                    String resolved   = resolveCallPropValue(prop, key);
+                    // 패턴상 group(1)은 필수 캡처 그룹이나, 널 역참조 정적분석 지적 대응으로 방어코드 추가
+                    String resolved   = (key != null) ? resolveCallPropValue(prop, key) : null;
                     item.setValue(resolved != null ? resolved : defaultVal);
                 }
             } else if (type == StandardType.GROUP) {