internal error - no_peer_socket - Connection is shutdown

[BSDNix]

trying the following command:
sudo ./bgp_simple.pl -myas 65000 -myip 192.168.6.43 -peerip 192.168.6.33 -peeras 65001 -p myroutes -v

gives me the following error after 2 seconds:
Error occured: type [Cease] Send Update: prfx [1.0.204.0/22] aspath [65000 49432 48362 6939 4766 38040 23969] orig [IGP] nxthp [192.168.6.43] 192.168.6.43:65000<=>192.168.6.33:65001: Internal error - no _peer_socket - Connection is shutdown

the myroutes file is a RIS file that was converted using the method described in the docs.