Which version of the Gecko SDK Suite are you using? The EFM32 parts only got Project Configurator and Pintool support with the recently released MCU SDK 184.108.40.206 and Gecko SDK version 3.1.0. If the 32-bit MCU SDK -220.127.116.11 is installed from [Install] > [Manage installed packages] then click the [SDKs] tab and the install link for MCU SDK 18.104.22.168 (this will automatically install Gecko Platform version 3.1.0). After the installation completes, from the Launcher perspective, select your board from the Debug Adapter window and make sure the Preferred SDK is set to Gecko SDK Suite 3.1.0 on the General Information card on the OVERVIEW tab. Then click Create New Project and select one of the [Platform] example projects:
The new project will be a configurable project and it will include a .pintool file that can be used to define the function of each of the pins.
Is this on an STK, or your own board? I'm not familiar with the error DR_OP 159. Can you attach a debug log to this thread? You can create a debug log by going to help -> report bug in Simplicity Studio.