diff --git a/hgdriver/hgdev/hg_scanner_200.cpp b/hgdriver/hgdev/hg_scanner_200.cpp
index c444e76..57a0355 100644
--- a/hgdriver/hgdev/hg_scanner_200.cpp
+++ b/hgdriver/hgdev/hg_scanner_200.cpp
@@ -1,4 +1,4 @@
-#include "hg_scanner_200.h"
+#include "hg_scanner_200.h"
 #include "../wrapper/hg_log.h"
 
 #if defined(WIN32) || defined(_WIN64)
@@ -825,7 +825,9 @@ int hg_scanner_200::set_leaflet_scan(void)
 
 int hg_scanner_200::set_clear_roller_num(void)
 {
-	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
+	std::lock_guard<std::mutex>      lock(io_lock_);
+	USBCB usbcb = { setting3288dsp::CLR_ROLLER_NUM,0,4 };
+	return writeusb(usbcb);
 }
 int hg_scanner_200::set_clear_history_num(void)
 {
@@ -980,6 +982,8 @@ int hg_scanner_200::get_devs_distortion_check_val(float& data)
 
 int hg_scanner_200::set_auto_flat(int data)
 {
+	return SCANNER_ERR_DEVICE_NOT_SUPPORT;
+
 	USBCB usbcb = { setting3288dsp::START_FLAT,data,0 };
 	int len = sizeof(usbcb);
 	int ret = SCANNER_ERR_OK;
diff --git a/hgdriver/hgdev/hg_scanner_239.cpp b/hgdriver/hgdev/hg_scanner_239.cpp
index 96aef5c..02af24b 100644
--- a/hgdriver/hgdev/hg_scanner_239.cpp
+++ b/hgdriver/hgdev/hg_scanner_239.cpp
@@ -1125,7 +1125,7 @@ void hg_scanner_239::thread_correction(void)
 				sinfo.resize(len);
 
 				io_->read_bulk(&sinfo[0],&len);
-				char buf[1024];
+				char buf[2048];
 				strcpy(buf, sinfo.c_str());
 				notify_ui_working_status(buf, SANE_EVENT_STATUS, status_);
 				printf("%s\r\n", sinfo.c_str());