Hi Vijay, On 3 févr. 2011, at 22:33, Vijay Pradeep wrote: > Hi Felix, > > > Waiting for Server: > Instead of calling waitForServer(), you can repeatedly call isServerConnected() > Refer to the docs: SimpleActionClient::isServerConnected() Is SimpleActionClient::isServerConnected() a recent addition? it does not seem to be define in my: /opt/ros/cturtle/stacks/common/actionlib/include/actionlib/client/simple_action_client.h while it is indeed in : http://www.ros.org/doc/api/actionlib/html/simple__action__client_8h_source.html Or am I including the wrong simple_action_client.h? PS: I am using the Ubuntu 10.4 VirtualBox appliance provided by WG, and which I regularly update. -- Felix The danger of science denial: http://tinyurl.com/yyg5sfd