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Thank very much for your help. It tried both methods. I actually have dropped packets. The log is : [rospy.client][INFO] 2011-06-16 17:00:10,089: init_node, name[/runtime_monitor_11983_1308236410083], pid[11983] [xmlrpc][INFO] 2011-06-16 17:00:10,090: XML-RPC server binding to 0.0.0.0 [xmlrpc][INFO] 2011-06-16 17:00:10,090: Started XML-RPC server [http://iis-xs-Satellite-Pro-L500:34239/] [rospy.init][INFO] 2011-06-16 17:00:10,090: ROS Slave URI: [http://iis-xs-Satellite-Pro-L500:34239/] [rospy.impl.masterslave][INFO] 2011-06-16 17:00:10,090: _ready: http://iis-xs-Satellite-Pro-L500:34239/ [xmlrpc][INFO] 2011-06-16 17:00:10,093: xml rpc node: starting XML-RPC server [rospy.registration][INFO] 2011-06-16 17:00:10,094: Registering with master node http://localhost:11311 [rospy.init][INFO] 2011-06-16 17:00:10,191: registered with master [rospy.rosout][INFO] 2011-06-16 17:00:10,192: initializing /rosout core topic [rospy.rosout][INFO] 2011-06-16 17:00:10,196: connected to core topic /rosout [rospy.simtime][INFO] 2011-06-16 17:00:10,199: /use_sim_time is not set, will not subscribe to simulated time [/clock] topic [rospy.internal][WARNING] 2011-06-16 17:00:28,642: Unknown error initiating TCP/IP socket to iis-xs-Satellite-Pro-L500:38642 (http://iis-xs-Satellite-Pro-L500:56842/): Traceback (most recent call last): File "/opt/ros/diamondback/stacks/ros_comm/clients/rospy/src/rospy/impl/tcpros_base.py", line 472, in connect self.socket.connect((dest_addr, dest_port)) File "/usr/lib/python2.7/socket.py", line 224, in meth return getattr(self._sock,name)(*args) error: [Errno 111] Connection refused

From the Sample Viewer, I tune the packet size to 1500 which seems to work. However, it seems that the driver tries to optimize this size and as a result change it a larger value, which cause the Sample Viewer to crash too. When I use the SDK taken from Prosilica website, I do not encounter such issues using the same fast Ethernet interface. I can't actually change to network interface as I'm using a laptop. I'm currently checking if there is a problem in the driver code.

Thank very much for your help. It tried both methods. I actually have dropped packets. The log is : :

[rospy.client][INFO] 2011-06-16 17:00:10,089: init_node, name[/runtime_monitor_11983_1308236410083], pid[11983]
[xmlrpc][INFO] 2011-06-16 17:00:10,090: XML-RPC server binding to 0.0.0.0
[xmlrpc][INFO] 2011-06-16 17:00:10,090: Started XML-RPC server [http://iis-xs-Satellite-Pro-L500:34239/]
[rospy.init][INFO] 2011-06-16 17:00:10,090: ROS Slave URI: [http://iis-xs-Satellite-Pro-L500:34239/]
[rospy.impl.masterslave][INFO] 2011-06-16 17:00:10,090: _ready: http://iis-xs-Satellite-Pro-L500:34239/
[xmlrpc][INFO] 2011-06-16 17:00:10,093: xml rpc node: starting XML-RPC server
[rospy.registration][INFO] 2011-06-16 17:00:10,094: Registering with master node http://localhost:11311
[rospy.init][INFO] 2011-06-16 17:00:10,191: registered with master
[rospy.rosout][INFO] 2011-06-16 17:00:10,192: initializing /rosout core topic
[rospy.rosout][INFO] 2011-06-16 17:00:10,196: connected to core topic /rosout
[rospy.simtime][INFO] 2011-06-16 17:00:10,199: /use_sim_time is not set, will not subscribe to simulated time [/clock] topic
[rospy.internal][WARNING] 2011-06-16 17:00:28,642: Unknown error initiating TCP/IP socket to iis-xs-Satellite-Pro-L500:38642 (http://iis-xs-Satellite-Pro-L500:56842/): Traceback (most recent call last):
  File "/opt/ros/diamondback/stacks/ros_comm/clients/rospy/src/rospy/impl/tcpros_base.py", line 472, in connect
    self.socket.connect((dest_addr, dest_port))
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
error: [Errno 111] Connection refusedrefused