diff --git a/BasicData/Tnb.BasicData/BasEbomService.cs b/BasicData/Tnb.BasicData/BasEbomService.cs
index 72dc9960..0a024b6f 100644
--- a/BasicData/Tnb.BasicData/BasEbomService.cs
+++ b/BasicData/Tnb.BasicData/BasEbomService.cs
@@ -46,7 +46,7 @@ namespace Tnb.BasicData
         {
             ISqlSugarClient db = _repository.AsSugarClient();
             Dictionary<string, object>? queryJson = (input == null || string.IsNullOrEmpty(input.queryJson)) ? null : input.queryJson.ToObject<Dictionary<string, object>>();
-            string materialInfo = queryJson?["query_info"]?.ToString() ?? "";
+            string materialInfo = queryJson.ContainsKey("query_info") ? queryJson["query_info"].ToString() : "";
             SqlSugarPagedList<EbomListOutput> list = await db.Queryable<BasEbomH, BasMaterial, BasRouteH>((a, b, c) => new object[]
                 {
                     JoinType.Left, a.material_id == b.id,