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Hi @FourTrees,

This could be a classic error I have faced before because of the process XnSensorServer.

It would be more useful if you can also share with us the output for

rostopic list

However, I can suggest you a possible solution (way around) which might just work. You need to basically restart the XnSensorServer Process. This can be done using the following two lines of command:

killall XnSensorServer

XnSensorServer

After performing this try to roslaunch the openni.launch file. Let us know if this works. Just to add to your information this happens when you launch openni topics multiple times as sometimes the XnSensorServer process is not properly cleared and shutdown.

Please note that if you have the process XnSensorServer linked to any other program or doing something else killing the process may not be a safe choice. It is advisable to kill/ Terminate any other processes using XnSensorServer killing this process.

GoodLuck, Regards, Sivam

Hi @FourTrees,

This could be a classic error I have faced before because of the process XnSensorServer.

It would be more useful if you can also share with us the output for

rostopic list

However, I can suggest you a possible solution (way around) which might just work. You need to basically restart the XnSensorServer Process. This can be done using the following two lines of command:

killall XnSensorServer

XnSensorServer

After performing this try to roslaunch the openni.launch file. Let us know if this works. Just to add to your information this happens when you launch openni topics multiple times as sometimes the XnSensorServer process is not properly cleared and shutdown.

Please note that if you have the process XnSensorServer linked to any other program or doing something else killing the process may not be a safe choice. It is advisable to kill/ Terminate any other processes using XnSensorServer killing this process.

GoodLuck, Regards, GoodLuck,

Regards,

Sivam

Hi @FourTrees,

This could be a classic error I have faced before because of the process XnSensorServer.

It would be more useful if you can also share with us the output for

rostopic list

However, I can suggest you a possible solution (way around) which might just work. You need to basically restart the XnSensorServer Process. This can be done using the following two lines of command:

killall XnSensorServer

XnSensorServer

After performing this try to roslaunch the openni.launch file. Let us know if this works. Just to add to your information this happens when you launch openni topics multiple times as sometimes the XnSensorServer process is not properly cleared and shutdown.

Please note that if you have the process XnSensorServer linked to any other program or doing something else killing the process may not be a safe choice. It is advisable to kill/ Terminate any other processes using XnSensorServer before killing this process.

GoodLuck,

Regards,

Sivam