The IXLYNEPL mapping macro provides the format of the notify exit parameter list. Include that macro as well as IXLYCON in your program.

When the notify exit returns to XES, you can no longer access the data in the NEPL.

The IXLSYNCH service is the only IXL-type service that should be issued in the notify exit on behalf of the resource that caused the Notify exit to be called. Other IXL-requests that are issued on behalf of the same resource might not complete.