diff --git a/projects/common/src/fm/services/item.service.ts b/projects/common/src/fm/services/item.service.ts
index 51c376d..31044b4 100644
--- a/projects/common/src/fm/services/item.service.ts
+++ b/projects/common/src/fm/services/item.service.ts
@@ -77,7 +77,9 @@ export class ItemService {
 
   getChildItemList(parentcode: string, itemType: string, dataFilter?: any, level: number = 1, deep: boolean = true): Observable<IItem[]> {
     var params = new HttpParams();
-    params = params.append("it", itemType);
+    if(itemType != null) {
+      params = params.append("it", itemType);
+    }
     if (dataFilter != null) {
       params = params.append("df", JSON.stringify(dataFilter));
     }