diff --git a/twain/twain/huagaods.cpp b/twain/twain/huagaods.cpp
index 016d270..c82a3c8 100644
--- a/twain/twain/huagaods.cpp
+++ b/twain/twain/huagaods.cpp
@@ -1571,6 +1571,7 @@ Twpp::Result huagao_ds::setupFileXferReset(const Twpp::Identity& origin, Twpp::S
 }
 Result huagao_ds::call(const Identity& origin, DataGroup dg, Dat dat, Msg msg, void* data) {
 	static bool in_calling = false;
+	static unsigned nested_events = 0;
 
 	bool	calling = in_calling;
 	if (calling)
@@ -1585,7 +1586,9 @@ Result huagao_ds::call(const Identity& origin, DataGroup dg, Dat dat, Msg msg, v
 			}
 			else
 			{
-				load_sane_util::log_info(L"Nested Call: discard 'Msg::ProcessEvent'!\r\n", 0);
+				if(nested_events == 0)
+					load_sane_util::log_info(L"Nested Call: discard 'Msg::ProcessEvent'!\r\n", 0);
+				nested_events++;
 				return { ReturnCode::NotDsEvent, ConditionCode::Success };
 			}
 		}
@@ -1600,6 +1603,13 @@ Result huagao_ds::call(const Identity& origin, DataGroup dg, Dat dat, Msg msg, v
 	{
 		in_calling = true;
 	}
+	if (nested_events > 1)
+	{
+		wchar_t buf[256] = { 0 };
+		swprintf_s(buf, _countof(buf) - 1, L"Discard %u nested Msg::ProcessEvent messages before.\r\n", nested_events);
+		load_sane_util::log_info(buf, 0);
+	}
+	nested_events = 0;
 
 	try {
 		// we can override almost anything from SourceFromThis, even the top-most source instance call