diff --git a/hgdriver/hgdev/hg_scanner.cpp b/hgdriver/hgdev/hg_scanner.cpp
index 0a8644b..b2b8fbc 100644
--- a/hgdriver/hgdev/hg_scanner.cpp
+++ b/hgdriver/hgdev/hg_scanner.cpp
@@ -162,6 +162,7 @@ hg_scanner::hg_scanner(ScannerSerial serial, const char* dev_name, usb_io* io, i
 	, firmware_sup_wait_paper_(false),firmware_sup_pick_strength_(false),firmware_sup_log_export_(false),firmware_sup_color_corr_(false),firmware_sup_wake_device_(false)
 	, firmware_sup_double_img(false),firmware_sup_devs_lock_(false),firmware_sup_dpi_300(false),firmware_sup_dpi_600(false),firmware_sup_auto_speed_(false),firmware_sup_morr_(false)
 	, firmware_sup_color_fill_(false),firmware_sup_history_cnt(false), have_max_size(false), is_discardblank(false)
+	, auto_scan_restore_(false), auto_scan_prev_(is_auto_paper_scan)
 {
 		#if !defined(_WIN32) && !defined(_WIN64) &&defined(x86_64)
 		isx86_Advan_ = false;
@@ -2352,10 +2353,34 @@ int hg_scanner::setting_scan_mode(void* data, long* len)
 	if (strcmp(str.c_str(), hg_log::lang_load(ID_OPTION_VALUE_SMZS_LXSM)) == 0)
 	{
 		scan_count_ = -1;
+
+		// restore AutoScan ?
+		if (auto_scan_restore_)
+		{
+			long len = sizeof(auto_scan_prev_);
+
+			setting_auto_paper_scan(&auto_scan_prev_, &len);
+			VLOG_MINI_2(LOG_LEVEL_DEBUG_INFO, "Restore 'AutoScan' to '%s' for user changes scan mode to '%s'\n"
+				, auto_scan_prev_ ? "true" : "false", str.c_str());
+		}
 	}
 	else
 	{
 		setting_jsn_.at(SANE_STD_OPT_NAME_SCAN_COUNT).at("cur").get_to(scan_count_);
+
+		// 智学网设置该参数时，程序取消待纸扫描
+		if (!auto_scan_restore_)	// 连续调用时，保留最初状态
+		{
+			auto_scan_restore_ = auto_scan_prev_ = is_auto_paper_scan;
+			if (auto_scan_restore_)
+			{
+				bool v = false;
+				long	len = sizeof(v);
+				setting_auto_paper_scan(&v, &len);
+				auto_scan_restore_ = true;
+				VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "Disable 'AutoScan' for user changes scan mode to '%s'\n", str.c_str());
+			}
+		}
 	}
 
 	VLOG_MINI_1(LOG_LEVEL_DEBUG_INFO, "set scanning pages to %d\n", scan_count_);
@@ -2634,6 +2659,9 @@ int hg_scanner::setting_auto_pick_paper_threshold(void* data, long* len)
  }
 int hg_scanner::setting_auto_paper_scan(void* data, long* len)
 {
+	hg_log::log(LOG_LEVEL_DEBUG_INFO, "No 'AutoScan' restroing for setting_auto_paper_scan invoked.\n");
+
+	auto_scan_restore_ = false;
 	is_auto_paper_scan = *((bool *)data);
 	if (!firmware_sup_wait_paper_ && is_auto_paper_scan)
 	{
@@ -4010,6 +4038,11 @@ int hg_scanner::get_image_info(SANE_Parameters* ii, int len)
 				iiex->flag.dpi = resolution_;
 				iiex->bytes = imh.bytes;
 			}
+			else if (imh.statu)
+			{
+				if (imh.statu == IMG_STATUS_DOUBLE)
+					ret = SCANNER_ERR_DEVICE_DOUBLE_FEEDING;
+			}
 		}
 	}
 
diff --git a/hgdriver/hgdev/hg_scanner.h b/hgdriver/hgdev/hg_scanner.h
index e2f3275..d542225 100644
--- a/hgdriver/hgdev/hg_scanner.h
+++ b/hgdriver/hgdev/hg_scanner.h
@@ -322,6 +322,8 @@ protected:
     int             feedmode_;                      // 分纸强度
     int             sleeptime_;                     // 睡眠时间
     bool            is_auto_paper_scan;             // 待纸扫描
+    bool            auto_scan_prev_;                // 保留待纸扫描程序改变状态之前的值 - 2023-10-16: 智学网根据扫描张数来打开或关闭待纸扫描
+    bool            auto_scan_restore_;             // 是否需要恢复待纸扫描状态         - 2023-10-16: 智学网根据扫描张数来打开或关闭待纸扫描
     bool            size_check;                     // 尺寸检测
 
     bool            save_feedmode_type_;            //保存分支强度狀態
diff --git a/hgdriver/hgdev/hg_scanner_300.cpp b/hgdriver/hgdev/hg_scanner_300.cpp
index 3d76218..2e38fd8 100644
--- a/hgdriver/hgdev/hg_scanner_300.cpp
+++ b/hgdriver/hgdev/hg_scanner_300.cpp
@@ -1,4 +1,4 @@
-#include "hg_scanner_300.h"
+#include "hg_scanner_300.h"
 #include "../wrapper/hg_log.h"
 
 #if defined(WIN32) || defined(_WIN64)
@@ -1590,7 +1590,10 @@ int hg_scanner_300::get_devs_cpu(string& cpu)
 	buff.resize(bufsize);
 	while (touch < usbcb.u32_Count) 
 	{
-		io_->read_bulk(&buff[0], &bufsize);
+		ret = io_->read_bulk(&buff[0], &bufsize);
+		if (SCANNER_ERR_OK != ret)
+			return ret;
+
 		out.write(&buff[0], bufsize);
 		touch += bufsize;
 		bufsize = bufsize > usbcb.u32_Count - touch ? usbcb.u32_Count - touch : bufsize;
@@ -1636,7 +1639,10 @@ int hg_scanner_300::get_devs_disk(string& disk)
 	buff.resize(bufsize);
 	while (touch < usbcb.u32_Count)
 	{
-		io_->read_bulk(&buff[0], &bufsize);
+		ret = io_->read_bulk(&buff[0], &bufsize);
+		if (SCANNER_ERR_OK != ret)
+			return ret;
+
 		out.write(&buff[0], bufsize);
 		touch += bufsize;
 		bufsize = bufsize > usbcb.u32_Count - touch ? usbcb.u32_Count - touch : bufsize;