I had a perfectly working setup: a probe Segger J-Link mini, GDBServer configured with SWV trace running at max speed over SWO wire, STM32CubeIDE and all it's "underwear" was upgraded to the latest (current) and everything worked including SWViewer. The only old version in the fully working system was the J-Link probe firmware (V7.00). As CubeIDE persisted in suggesting to upgrade that FW, I finally did that. After the upgrade the Debugger to the latest V7.60e , it stopped working. Specifically …