Problem with HDL Workflow Advisor and USRP N210

Hello,

I have the Ettus USRP N210 and it works just fine with Simulink. But when I try to reproduce the "FPGA Targeting with USRP® N210 Hardware" example, a problem occurs with the HDL Workflow Advisor. Checks 1. to 3. all pass without problems, but when I try to run 4. "Generate FPGA Implementation", I get the error message "Failed to generate project for FPGA-in-the-Loop." without any further explanation. What could be the problem?

Thank you!