ASSERT on CFileDialog.DoModal()

[Szymon Pusz]

My code looks like this: CFileDialog m_FileDialog(FALSE); m_FileDialog.m_ofn.Flags = OFN_HIDEREADONLY; m_FileDialog.m_ofn.lpstrFilter = "Rich Text Format (*.rtf)\0*.rtf\0"); m_FileDialog.m_ofn.lpstrDefExt = "*.rtf"; m_FileDialog.DoModal(); <------------------- Why do I get an assertion failed on DoModal() ???