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Under review


传说故事中国古代历史(中国历史传说) 6 months ago in General Questions updated by Support 6 months ago 1



Error importing the Package

rexgatling1988 12 months ago in realvirtual.io Starter and Professional updated by R S 8 months ago 5

I get this error when I import the package to Unity:

Assets/game4automation/private/RuntimeUI/SceneMouseNavigation.cs(801,38): error CS0103: The name 'SpaceNavigator' does not exist in the current context

Support 8 months ago

Is fixed in latest release.

Under review

Circular conveyor belt

yangkang 1 year ago updated by Support 1 year ago 1


I wanted to achieve a circular conveyordemo effect (Fig1), a reference to radialConveyordemo (Fig2), but the MU transported in a circular conveyordemo is skewed in position, and I froze the XYZ rotation of the MU

Image 878

Fig 1

Image 877

Fig 2

Under review

OPCUA Interface - Error in activating session

Ernesto 2 years ago in OPCUA4Unity updated by Support 2 years ago 30

Dear all,

I'm having problems to connect to a remote OPC UA server using the OPCUA Interface Component.

I followed the "Connection troubleshouting" guidelines provided in "/game4automation/Documentation/opcua.html".

Configuring the OPC Server with "No security certificates and passwords" I could connect OPC Watch with the server (see Image):

Image 576

However, when I tried connecting through the Unity OPCUA Interface:

Image 577

I get the following error message:

OPCUA Interface - Error in activating session [BadUnknownResponse]
UnityEngine.Debug:LogError (object)
game4automation.OPCUA_Interface:Connect () (at Assets/game4automation/private/Interfaces/OPCUA4Unity/OPCUA_Interface.cs:179)
game4automation.OPCUA_Interface:EditorImportNodes () (at Assets/game4automation/private/Interfaces/OPCUA4Unity/OPCUA_Interface.cs:246)
game4automation.OPCUAInterfaceEditor:OnInspectorGUI () (at Assets/game4automation/private/Interfaces/OPCUA4Unity/private/Editor/OPCUAInterfaceEditor.cs:20)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

As it can be seen in the last image, I'm using Unity 2021.3.2f1 Editor with Game4Automation Digital Twin Professional 2020.

Any idea of what I'm missing?

Thank you in advanced.

Support 2 years ago

Hi, I checked. I found an issue with reconnection, that is why I am attaching here a new script. This will be included in next release.


The disconnect problem and the PLCOutputBool can't be reproduced here on my computer with Simit.


No Mutex PLCSim Advanced Interface proble

Pablo 2 years ago in realvirtual.io Starter and Professional updated by Support 2 years ago 18


we are using the PLCSim Advanced Interface.

We can Import the PLCSignals without any Troubles:

Image 519

The first time that we start the simulation in Unity everything is working fine (COM OK).

But after we stop the unity editor and try to start again, we get “No Mutex”... so no communication is established between the plc and Unity.

We found out that creating a new PLC Instance and re-importing the signals “fix the error”... but just for the first run. Then we have to repeat the process of creating a new PLC again and again...

Could be some background process blocking the communication? Thank you in advance.

Support 2 years ago

Current working coupler.exe is available in the download area:



Robodk version with game4automation professional or game4automation OPC UA

efrensilveyra 3 years ago in OPCUA4Unity updated by Support 3 years ago 1

Which version of robodk is compatible with game4automation opc ua or game4automation professional. I ask, because I want to communicate robodk 4.0 with game4automation professional.


When will Unity 2019 be supported?

Stan 4 years ago in OPCUA4Unity updated by Support 4 years ago 5


I was wondering when will OPC UA for Unity 2019 will be supported?

With kind regards,

Stan (Developer at Siemens)

Support 4 years ago

Hi, we have no tutorial about that.Even if Unity 2019 is not officially supported yet, you should be able to get it running. What is your problem. What kind of error messages do you have?


are method calling available?

mojer 6 days ago in OPCUA4Unity updated by Support yesterday at 7:05 a.m. 1


I was wondering if It is possible to call methods of a OPCUA server from the unity Side and how it can be done.

Thanks in advances



Jackson Pham 2 weeks ago in CADLink updated by Support 2 weeks ago 1

Dear friends,

Is there any solutions that I could import my own step file without using Cad Link (Pro)

I am now using Starter RealVirtual.

My budget is limmted.