I posted this question already a few days ago, but didn't get any answer, so I try it again: Is it possible to change the callTimeOutPeriod at Runtime e.g: callTimeOutPeriod(omniORB::clientSide,100); .... // CORBA function call callTimeOutPeriod(omniORB::clientSide,500); .... // CORBA function call Thank's for your help Andreas