Hello d.stebani@jopp.com,
At first sight, probably the FreeMaster project uses another location for the elf file. To select the right one please go to Project->Options->MAP Files and at the "Default symbol file" select the correct elf file from your computer.
But you should also check that you are using the latest FreeMaster version.
Also, this forum is dedicated for the Model Based-Design Toolbox (which generates embedded code from Simulink) and from the link specified I think you are using an S32Design Studio example.
Let's try what I suggested and If didn't work we will recommend you the right spot to ask this question.
Best Regards,
Marius