Hi Ashutosh,
in most cases where we see this problem, it is some firewall or router inbetween the external program and the SAP system, that is closing the connection because of "inactivity". There are two possibilities to fix this problem. Background on this topic can be found in note 1332022.
- The CPIC/RFC gateway can be configured to send periodic "pings" to the external program, so that the firewall/router considers the connection as active. See profile parameters gw/keepalive and gw/reg_keepalive. The ping interval should be smaller than the connection idle timeout on the firewall/router.
- Similar to the above, the external program can be instructed to send periodic "pings" to the gateway. This can be done via environment variables that need to be set in the environment where the external program is started: see note 1766471.
(And the third "fix" is of course increasing the router/firewall timeout, if the network admins of your network permit this. E.g. it may be possible to grant "unlimited" connection idle time for connections from the host, where the external program is running, to the host, where the gateway is running.)
Best Regards, Ulrich