-- Bad file number error
-- procengine(procengine(ta_xfb)): XFB.ClientReply: server error: Bad file number

* This problem has lately been observed over Gateway 6.13.0 & Integrator 2.1.1 inter-communication.

1. Install IXFB_112-01-31 patch for XFB Connector on Integrator 2.1.1.
2. Install SP1 P7 of Gateway 6.13.0.
3. This enables you to use a newly introduced timeout variable i.e. XFBCONN_REPLY_TIMEOUT in Gateway.
4. Set XFBCONN_REPLY_TIMEOUT timeout variable to the desired value ( It is 10 seconds by default).
5. Execute Gateway profile.
6. Restart Gateway.