Hi,
telling the player client to do this:
simulation->GetProperty("world", "sim_time", &sim_time, sizeof(double));

results in this backtrace of the player server:

#0  QueuePointer::DecRef (this=0x732e6e69) at message.cc:738
#1  0xb7ef5abd in ~QueuePointer (this=0x732e6e69) at message.cc:640
#2  0xb5e86aaf in gazebo::SimulationInterface::ProcessMessage (this=0x8055868, 
[EMAIL PROTECTED], hdr=0x8064098, data=0x8063df0) at 
player/SimulationInterface.cc:69
#3  0xb5e853fc in gazebo::GazeboDriver::ProcessMessage (this=0x8062870, [EMAIL 
PROTECTED], hdr=0x8064098, data=0x8063df0) at player/GazeboDriver.cc:157
#4  0xb7eed365 in Driver::ProcessMessages (this=0x8062870, maxmsgs=1) at 
driver.cc:393
#5  0xb7eed535 in Driver::ProcessMessages (this=0x8062870) at driver.cc:373
#6  0xb5e8545f in gazebo::GazeboDriver::Update (this=0x8062870) at 
player/GazeboDriver.cc:209
#7  0xb7eef2a8 in DeviceTable::UpdateDevices (this=0x804d008) at 
devicetable.cc:256
#8  0x08049f79 in main (argc=134626504, argv=0x8063bf0) at server.cc:315

Regards,
Ben
-- 
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