diff --git a/app/scanner2/device_user.cpp b/app/scanner2/device_user.cpp
index 1e6fffa8..9d4e4f2b 100644
--- a/app/scanner2/device_user.cpp
+++ b/app/scanner2/device_user.cpp
@@ -262,7 +262,7 @@ HGResult DeviceUser::Open()
     {
         HGChar errInfo[256];
         HGResult ret = HGSane_OpenSelectedDevice(m_source, m_wnd, &m_saneDev, errInfo, 256);
-        if (HGBASE_ERR_OK != ret)
+        if (HGBASE_ERR_OK != ret && strlen(errInfo) != 0)
         {
             QMessageBox::information(m_wnd, tr("Prompt"), errInfo);
         }
diff --git a/modules/sane_user/HGSaneImpl.cpp b/modules/sane_user/HGSaneImpl.cpp
index 70f5e9bf..6cde6486 100644
--- a/modules/sane_user/HGSaneImpl.cpp
+++ b/modules/sane_user/HGSaneImpl.cpp
@@ -558,6 +558,7 @@ HGResult HGSaneSourceImpl::OpenSelectedDevice(HGWindow parent, class HGSaneDevic
     int id = choose_scanner(devs);
     if (-1 == id)
     {
+        memset(errInfo, 0, sizeof(errInfo));
         return HGSANE_ERR_FAIL;
     }