diff --git a/twain/twain/huagaods.cpp b/twain/twain/huagaods.cpp
index 34f91df..a86767f 100644
--- a/twain/twain/huagaods.cpp
+++ b/twain/twain/huagaods.cpp
@@ -1672,6 +1672,11 @@ Result huagao_ds::call(const Identity& origin, DataGroup dg, Dat dat, Msg msg, v
 						rt = { ReturnCode::Success, ConditionCode::Success };
 					}
 				}
+				else if (rt.status() == ConditionCode::Bummer && rt.returnCode() == ReturnCode::XferDone && scanner_status_ == SCANNER_STATUS_STOPPED)	// for demo.exe
+				{
+					changed = true;
+					rt = { ReturnCode::Success, ConditionCode::Bummer };
+				}
 				if(changed)
 					load_sane_util::to_log(7, L"  modify result to {%s, %s}.\r\n", desc_return_code(rt, rcs), desc_condition_code((ConditionCode)(Status)rt, cs));
 			}