I am using openwithparm to open a child window within a response window. The very first time, I do this openwithparm opens the window, but after that openwithparm returns -1. When I am debugging, it doesn't even go to open event of the window. Does anyone know what makes openwithparm to fail and if there is discription of error codes? I checked both the parameters I passed to openwithparm and they are not null.