SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32

System Workbench Compile error

I know this is an old post, but I had the same issue, moved everything to become path without spaces in the folder names.
Everything worked afterwards.
Had my project in my documents folder and the IDE iin AC6 folder on root, which as you can see caused the problem.
So the project folder can not have spaces in its path.
Need confirmation through if this is an eclipse issue,which I believe so as my search for such problem returned originally C++ posts about similar error.
One other thing, I realized that my code compiled and uploaded to my STM micro, which is weird since the error was appearing after the upload. Not sure what exactly was happening in the background for this error to appear, which makes sense to investigate further.
I would really appreciate some feedback on this if anyone can elaborate on the inner workings of this.