The maximum number of environments that the system can initialize in an address space is defined in an environment table called IRXANCHR. The default number of environment table entries is 401. To change the number of environment table entries, you must create a new IRXANCHR load module. TSO/E provides a SYS1.SAMPLIB member called IRXTSMPE, which is an SMP/E user modification (USERMOD) to change the maximum number of language processor environments in an address space. Instructions for using IRXTSMPE are included in the prolog of the IRXTSMPE member in SYS1.SAMPLIB.