Hi, thanks for quick reply. I am definitely returning a value. I will try using new. Will it help, if I send anyone the debugger output ? Thanks. > -- Nils H. Busch Max-Planck-Institute of Cognitive Neuroscience phone: ++49 (341) 9940-335 fax: ++49 (341) 9940-204 e-mail: nilsb at cns.mpg.de