.. _fatal_error: Fatal Error (dcc:1635): License Error: Unknown LMAPI error ============================================================ .. image:: fatal_error_img1.jpg A workaround is to add an environmental variable named "WRSD_License_File". .. image:: fatal_error_img2.jpg Follow the steps mentioned in the sim-api user guide, Section 2.5.12 Windriver C compiler v5.9.4.8. .. image:: fatal_error_img3.JPG Restart your PC and rebuild the model.