Launch multi-core debugging with J-Link
To launch multi-core debugging with J-Link:
Open two instances of IAR Embedded Workbench.
Select the CM33 project in the first IDE instance and click Project > Debug without Downloading. The debugger will reset the target, and halt at the beginning of the CM33 project's main().
Select the the CM55 project in the second instance and select: Project > Attach to Running Target.
After performing the attach, run the CM55 core before continuing with the debugging of the CM33 project.