Older versions of Aldec Riviera-PRO and Active HDL cannot read encrypted simulation models from certain Quartus II and Quartus Prime software versions - Older versions of Aldec Riviera-PRO and Active HDL cannot read encrypted simulation models from certain Quartus II and Quartus Prime software versions Description If you update an encrypted simulation model from Quartus II software verison 15.0 or prior after August 2015, or if you have an encrypted simulation model from Quartus Prime software version 15.1, you can only read the model using Aldec Riviera-PRO version 2015.06 (or newer) and Active-HDL version 10.2 Update 2 (or newer). Resolution Upgrade to Aldec Riviera-PRO version 2015.06 and Active-HDL version 10.2 Update 2. For more information, contact Aldec\'s Support Center. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 15.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']