Error during AS 4.12 installation, error code 4736. Windows 11 Enterprise Version 25H2 OS build 26200.8039 Could not find anything related to this in AS help.

Good question, for sure we can install both versions and run them at the same time as described in this post Is it possible running both Automation Studio versions (4 and 6) side by side but I’m not sure if we must install AS 4.12 before AS 6. I think, as @kovarj said, we should involve local S…

Do you have .NET 3.5 installed / enabled? See this post for reference: Error code 4735 during AS 4.12 installation - Ask Questions / B&R Software & Runtime - B&R Community

You can verify it: Verify .NET 3.5 is truly installed, not just checked: Open PowerShell as Admin: Get-WindowsOptionalFeature -Online -FeatureName "NetFx3" State should be Enabled (not EnablePending) From my PC [image]

This looks ok. So problem obviously is somewhere else ;( I think you will need to get in touch with local support team. Maybe it is something new.

I checked with AI and it pointed a possible issue with TG: In B&R Automation Studio 4.12, error code 4736 typically indicates that the Technology Guarding (TG) or CodeMeter licensing service has encountered an internal error, often due to an invalid software container or a conflict with existing li…

Is it maybe a problem, if you first install AS6.5 and later AS4.12

Closed as a support ticket. @Daniel_Specht please update us with your findings.

Error code 4736 during AS 4.12 installation

Ask Questions B&R Software & Runtime

kovarj (Jaroslav Kovar) April 9, 2026, 8:54am 4

I’m not sure… but here in this discussion, 3.5 was activated with subfolders as well. Error code 4735 during AS 4.12 installation - #3 by austin.carpenter

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Error code 4736 during AS 4.12 installation

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