I use 4 microcontrollers STM32F427 in JTAG chain on one board. I try to use JTAG chaining with RealView ULINK2. In tab Configure Flash Tools-Debug - Use ULINK2/ME Cortex Debugger -Settings window JTAG Device Chain is not active. I can not programm controllers in chain separately. What is the reason? If I choice in Project options STM32F053 (in example Nucleo-053 ), - window JTAG Device Chain is active.
Check if you have a “Pack” tab under settings and disable the default debug description.
I removed the "Enable" checkbox in the "Pack" tab. Now it became possible to have separate access to each controller in the JTAG chain. Thanks.