diff --git a/modules/saneui/hg_settingdialog.cpp b/modules/saneui/hg_settingdialog.cpp
index c2bb8d61..a2b608f6 100644
--- a/modules/saneui/hg_settingdialog.cpp
+++ b/modules/saneui/hg_settingdialog.cpp
@@ -923,7 +923,12 @@ void hg_settingdialog::slot_checkedClicked()
     m_list_IdValueTitle.append(QPair<QPair<int, QVariant>, QString>(QPair<int, QVariant>(id, checkBoxcurrentState), md5(opt->title)));
 
     SANE_Int method = 0;
-    m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &checkBoxcurrentState, &method);
+    SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &checkBoxcurrentState, &method);
+    if (ret == SANE_STATUS_UNSUPPORTED)
+    {
+        QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+        return;
+    }
     if((method & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
         updateUIStatus();
     else if(method & SANE_INFO_INEXACT)
@@ -977,7 +982,12 @@ void hg_settingdialog::slot_string_list_comboBoxClicked()
         *((SANE_Fixed*)buf) = SANE_FIX(atof(comboBoxcurrentItem.c_str()));
     else
         strcpy(buf, comboBoxcurrentItem.c_str());
-    m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, buf, &method);
+    SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, buf, &method);
+    if (ret == SANE_STATUS_UNSUPPORTED)
+    {
+        QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+        return;
+    }
     if((method & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
         updateUIStatus();
     else if(method & SANE_INFO_INEXACT)
@@ -1002,7 +1012,12 @@ void hg_settingdialog::slot_pushButtonClicked()
             after = 0;
 
     // restore to default setting ?
-    m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, NULL, &after);
+    SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, NULL, &after);
+    if (ret == SANE_STATUS_UNSUPPORTED)
+    {
+        QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+        return;
+    }
     if((after & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
         updateUIStatus();
 
@@ -1229,7 +1244,12 @@ void hg_settingdialog::slot_word_list_comboBoxClicked(int value)
 
 
     SANE_Int method = 0;
-    m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &temp, &method);
+    SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &temp, &method);
+    if (ret == SANE_STATUS_UNSUPPORTED)
+    {
+        QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+        return;
+    }
     if((method & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
         updateUIStatus();
     else if(method & SANE_INFO_INEXACT)
@@ -1285,7 +1305,12 @@ void hg_settingdialog::slot_sliderClicked(int value)
 
             m_list_IdValueTitle.append(QPair<QPair<int, QVariant>, QString>(QPair<int, QVariant>(id, temp), md5(opt->title)));
         }
-        m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &val, &method);
+        SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &val, &method);
+        if (ret == SANE_STATUS_UNSUPPORTED)
+        {
+            QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+            return;
+        }
         if((method & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
             updateUIStatus();
         else if(method & SANE_INFO_INEXACT)
@@ -1354,7 +1379,12 @@ void hg_settingdialog::slot_spinBoxClicked(int value)
         m_list_IdValueTitle.append(QPair<QPair<int, QVariant>, QString>(QPair<int, QVariant>(id, temp), md5(opt->title)));
 
         SANE_Int method = 0;
-        m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &temp, &method);
+        SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, &temp, &method);
+        if (ret == SANE_STATUS_UNSUPPORTED)
+        {
+            QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+            return;
+        }
         if((method & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
             updateUIStatus();
         else if(value != temp)
@@ -1405,7 +1435,12 @@ void hg_settingdialog::slot_lineEditInput()
         buf = malloc(opt->size * 2 + 4);
         strcpy((char*)buf, lineEditCurrentText.c_str());
     }
-    m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, buf, &method);
+    SANE_Status ret = m_saneAPI.sane_control_option_api(m_devHandle, id, SANE_ACTION_SET_VALUE, buf, &method);
+    if (ret == SANE_STATUS_UNSUPPORTED)
+    {
+        QMessageBox::information(this, tr("Prompt"), tr("The funtion is unsupported"));
+        return;
+    }
     if((method & SANE_INFO_RELOAD_OPTIONS) == SANE_INFO_RELOAD_OPTIONS)
         updateUIStatus();
     else if(method & SANE_INFO_INEXACT)