diff --git a/sakura_core/dlg/CDlgExec.cpp b/sakura_core/dlg/CDlgExec.cpp
index c697dda619..54fa35e230 100644
--- a/sakura_core/dlg/CDlgExec.cpp
+++ b/sakura_core/dlg/CDlgExec.cpp
@@ -134,24 +134,29 @@ void CDlgExec::SetData( void )
 	/*****************************
 	*         データ設定         *
 	*****************************/
-	wcscpy( m_szCommand, m_pShareData->m_sHistory.m_aCommands[0] );
 	hwndCombo = GetItemHwnd( IDC_COMBO_m_szCommand );
 	Combo_ResetContent( hwndCombo );
-	::DlgItem_SetText( GetHwnd(), IDC_COMBO_TEXT, m_szCommand );
-	int nSize = m_pShareData->m_sHistory.m_aCommands.size();
-	for( i = 0; i < nSize; ++i ){
-		Combo_AddString( hwndCombo, m_pShareData->m_sHistory.m_aCommands[i] );
+	const int nCommandsCount = m_pShareData->m_sHistory.m_aCommands.size();
+	if( 0 < nCommandsCount ){
+		wcscpy( m_szCommand, m_pShareData->m_sHistory.m_aCommands[0] );
+		::DlgItem_SetText( GetHwnd(), IDC_COMBO_TEXT, m_szCommand );
+		for( i = 0; i < nCommandsCount; ++i ){
+			Combo_AddString( hwndCombo, m_pShareData->m_sHistory.m_aCommands[i] );
+		}
+		Combo_SetCurSel( hwndCombo, 0 );
 	}
-	Combo_SetCurSel( hwndCombo, 0 );
 
-	wcscpy( m_szCurDir, m_pShareData->m_sHistory.m_aCurDirs[0] );
 	hwndCombo = GetItemHwnd( IDC_COMBO_CUR_DIR );
 	Combo_ResetContent( hwndCombo );
-	::DlgItem_SetText( GetHwnd(), IDC_COMBO_TEXT, m_szCurDir );
-	for( i = 0; i < m_pShareData->m_sHistory.m_aCurDirs.size(); ++i ){
-		Combo_AddString( hwndCombo, m_pShareData->m_sHistory.m_aCurDirs[i] );
+	const int nCurDirsCount = m_pShareData->m_sHistory.m_aCurDirs.size();
+	if( 0 < nCurDirsCount ){
+		wcscpy( m_szCurDir, m_pShareData->m_sHistory.m_aCurDirs[0] );
+		::DlgItem_SetText( GetHwnd(), IDC_COMBO_TEXT, m_szCurDir );
+		for( i = 0; i < nCurDirsCount; ++i ){
+			Combo_AddString( hwndCombo, m_pShareData->m_sHistory.m_aCurDirs[i] );
+		}
+		Combo_SetCurSel( hwndCombo, 0 );
 	}
-	Combo_SetCurSel( hwndCombo, 0 );
 	
 	int nOpt;
 	hwndCombo = GetItemHwnd( IDC_COMBO_CODE_GET );