diff --git a/src/device/DeviceManager.cpp b/src/device/DeviceManager.cpp
index ede888e..ed12d00 100644
--- a/src/device/DeviceManager.cpp
+++ b/src/device/DeviceManager.cpp
@@ -43,7 +43,7 @@ void ErrorCallback(const char* msg)
 }
 
 void DeviceManager::emitErrorCallback(const char *msg) {
-    this->setErrorOccurred(true);
+    errorOccurred=true;
     printf("Error Callback , message:%s\r\n", msg);
     QString m(msg);
     emit raiseGlobalError( m);
@@ -132,7 +132,7 @@ void DeviceManager::initDevice() {
 			if (!ScanControl(PREVIEW_SCAN))
 			{
 				qDebug() << "Preview success!";
-				lastStatus = SCANNING;
+//				lastStatus = SCANNING;
 				previewing = true;
 				//                timerID = startTimer(500);
 				TRIGGER_EVENT(GUIEvents::ResponsePreview, nullptr, nullptr);
@@ -180,7 +180,7 @@ void DeviceManager::initDevice() {
 				qDebug() << "Preview data response event end!";
 			}
 			else{
-			    lastStatus = READY;
+//			    lastStatus = READY;
                 previewing = false;
                 AppGlobalValues::setInProcessing(false);
 			    QThread::sleep(3);
@@ -226,7 +226,7 @@ void DeviceManager::timerEvent(QTimerEvent* event) {
             return;
         } else {
             //未发生错误并且，之前状态是扫描，代表正常扫描完成
-            if (lastStatus == SCANNING ) {
+            if (lastStatus == SCANNING && ! errorOccurred) {
                 prepareFinishScan();
             }
             //一般不会出现其他情况