LAUNCHXL-F28P55X: Unable to flash Launchpad using Uniflash

Part Number: LAUNCHXL-F28P55X
Other Parts Discussed in Thread: UNIFLASH,

Tool/software:

Hello,

I'm unable to use Uniflash 9.3 (same with 9.1) to flash a hex file onto a F28P55x. Messages are:

[2.10.2025, 13:49:57] [WARNING] IcePick_C_0: Warning: A firmware update is required for the XDS110 probe. The current firmware is version 3.0.0.36. The probe must be upgraded to firmware version 3.0.0.38 to be compatible with this software. Click the "Update" button to update the firmware. DO NOT UNPLUG THE DEBUG PROBE DURING THE UPDATE. (Emulation package 20.3.0.3656)
[2.10.2025, 13:50:24] [ERROR] IcePick_C_0: Error connecting to the target: (Error -2131 @ 0x0) Unable to access device register. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 20.3.0.3656)
I tried this twice, with the very same result. I tried to change the erase settings from "Necessary Sectors Only" to "Entire Flash".
One the other hand, I'm able to flash the device, using DSLite as shipped with CSS version 12.8.1.
Is this a known issue, is there something, that I could have done wrong?
best regards
Torsten