In order to determine the TCP/IP stack that is to be used by the Adabas SQL Gateway data server, you must add an assignment for the SAS/C environment variables 'TCPIP_MACH' to the CNXPARMS member described in To verify installation and start the CONNX Listener process.

For IBM TCP/IP, the socket library must locate the TCP/IP address spaced under z/OS. The name of the address space may vary from site to site.

The SAS/C compiler uses the TCPIP_MACH environment variable to determine the value of this name. If the TCPIP_MACH variable does not exist, the socket library searches for the name in the TCPIP.DATA files under z/OS. If this file is not available, the socket library uses a default value of TCPIP to locate the TCP/IP address space.

For more information, refer to http://support.sas.com/documentation/onlinedoc/sasc/doc700/html/lr2/zr2netma.htm