Thank you for your inquiry. Unfortunately DS-5 is no longer supported by J-Link as Arm has broken compatibility to often and due to low demand, support for newer DS-5 releases has not been implemented. Currently there are no plans to add DS-5 support again. As an alternative we recommend using Ozone, the cross-platform J-Link debugger which works with all popular C toolchain output formats: https://www.segger.com/products/devel…-link-debugger/