Hi Dirk, >> In file included from qtvision.cpp:22: >> qtvision.h:420: field `_fileFormatsRead' has incomplete type > Try adding "#include <qstringlist.h>" to qtvision.h and let me know if it > helps. Thanks, this helped! :-) Kind regards - michael > -- > Dirk Ziegelmeier * dirk at ziegelmeier.net * http://www.ziegelmeier.net