RTT no writing

[maxd-nordic]

Hi!
I'm trying to replace the deprecated pynrfjprog with pylink to do RTT comms. I know that my setup should work because it does with that other library. Unfortunately, rtt_write always returns 0, even with added time.sleep() calls.
Reading seems to work fine, I get the boot banner of my app. Am I missing something?

Setup:

• pylink-square 1.4.0
• JLink V7.96i
• nRF5340 JLink OB (nRF9151-DK)
• Ubuntu 24.04

[hkpeprah]

Hello, do you have sample code, and logs?

[maxd-nordic]

slightly different setup, but same problem.
source: https://github.com/nRFCloud/utils/blob/f18a9cadfdab48c1e4dc4b237ae9edbf1f72d84b/src/nrfcloud_utils/comms.py#L376
log: log.txt