[Serusers] Issues with SER for TCP load testing

Hi folks, I am new to the mailing lists - unsure as to which list is the most appropriate I have mailed to both - I apologise for this in advance! I am using SIPP and SER(v 0.9.4) to load test an application - SIPP is sending calls via UDP to SER at 15 cps and with a duration of 180 seconds. SER is then forwarding on the calls to the application using TCP and receiving the replies back over TCP. However I am seeing quite a few errors in SER after a while. I'd like to determine if the issues I am seeing are with SER or with the application itself so I'd appreciate some help with the following errors. Can someone tell me, for each of the error traces below, what is the root cause of it and (even better) how I can resolve it for SER - if it is indeed an issue with SER and not with the application. 1) 123(14715) ERROR: tcpconn_new: mem. allocation failure 123(14715) ERROR: tcp_main_loop: tcpconn_new failed, closing socket 2) 54(14646) ERROR: tsend_stream: failed to send: (32) Broken pipe 54(14646) ERROR: tcp_send: failed to send 3) 65(14785) ERROR: tcp_blocking_connect: SO_ERROR (146) Connection refused 65(14785) ERROR: tcpconn_connect: tcp_blocking_connect failed 65(14785) ERROR: tcp_send: connect failed 65(14785) msg_send: ERROR: tcp_send failed 4) 63(14783) ERROR: tsend_stream: send timeout (10000) 63(14783) ERROR: tcp_send: failed to send 5) There was also another error on the TCP select loop - select failed: Too many connections (or something similar). I have been playing around with the number of descriptors set using limit but without success. Like I said, my main concern is to eliminate SER where possible as the cause of these issues before focusing attention on the application. Thanks in advance, Steve.