The local file specification that is to be searched by the APPC attach manager when no DEFINE_TP verb has been issued for the TP name received on an incoming attach. In this case, the attach manager will attempt to start a program whose file name is the same as the incoming TP name. If found, the program is loaded. If not found, the attach is rejected. The value '*' indicates that the normal search path for executable programs is to be used for locating an undefined transaction program. A null string indicates that there is no default file specification for undefined transaction programs.