Device Family: Intel® Stratix® 10 DX, Intel® Stratix® 10 SX, Intel® Stratix® 10 TX

Intel Software: Quartus Prime Pro

Type: Answers

Area: Component

Last Modified: January 06, 2021
Version Found: v20.1
Bug ID: 18010400116

Error (18939): Unexpected error in JTAG server: Different TAPS selected


You may see this error when configuring Intel® Stratix® 10 SoC devices using Intel® Quartus® Prime Programmer or quartus_pgm if the FPGA JTAG and HPS JTAG are chained. When chained internally, the HPS will appear at device index 1 and the FPGA will be at device index 2.


To avoid this error, ensure you target the appropriate device in the chain. Prior to programming. you can identify the device position in the JTAG chain by clicking on Auto-Detect in the Intel Quartus Prime Programmer GUI or running jtagconfig in command line.