Arm Mbed OS support forum

Mbed Studio [ERROR] armclang: error: System clock tampering detected. License checkout will fail. armclang: error: Failed to check out a license

I installed Mbed Studio 0.91 on my Mac (I had a previous version 0.6x) installed before. I am getting the following error message:

[ERROR] armclang: error: System clock tampering detected. License checkout will fail.
armclang: error: Failed to check out a license.

Any idea how I can fix this. I removed the old version and the Application Support files, however I don’t get it to work.

Any ideas?

1 Like

Hi I also have the same issue, I would like to know if you got the solution please

Windows or Mac?
What have you changed?

I’m using windows 10 and I don’t remember changing anything recently on my pc.

Hello,

I have only a Tip, because I work on Windows 10 and I haven’t this issue. If not help, sorry for spam :slight_smile:
If you already have an another application (Keil or something) where is also installed/used same tool, then is a chance there is a collision between versions.
I had an old Git app already installed and after an update of the MbedStudio, where was probably instaled new version of the Git app, I was unable to import from github, until I uninstaled the old git version.
The Git was probably called from ProgramFiles via a system path, instead of from folders for MbedStudio. That issue (about Git) was fixed in Version 0.8.0 of MbedStudio.

BR, Jan

We have occasionally seen this issue, which as the error suggests seems to be due to the compiler licensing. The Arm Compiler team are aware of it, but it is challenging to reproduce, so if you have any additional information that might help, please email studio@mbed.com and we’ll pass it on.

So that you don’t get blocked, you can use GCC instead with Studio if you like by following these instructions: https://os.mbed.com/docs/mbed-studio/current/installing/switching-to-gcc.html

I am having this problem on a Mac, I am happy to trace whatever is needed. What kind of information do you need?

PS: GCC I am using on a CLI base, however the ARM compiler produces smaller/better code.

I am as well happy to test a Mbed pre-release version to verify if the problem still exists.

Re-installingthe entire Mac (clean install disk) is just too much work for me.