topic Persistent Wire Ack Fault error debugging MIMXRT1060-EVKB in MCUXpresso IDE

Persistent Wire Ack Fault error debugging MIMXRT1060-EVKB

rdmikkelsen — Tue, 07 Apr 2026 22:39:18 GMT

I am getting an error in MCUXpresso IDE when trying to debug on a MIMXRT1060-EVKB board (i.MX RT1060 Evaluation Kit) after a successful build. The error is:

Unable to connect wire for probe index 1.

Error: Wire Ack Fault - target connected?

followed by:

02: Failed On connect

Could not connect to core.

31: No connection to chip's debug port

No changes to the code, jumpers, or other configurations have been changed since it debugged successfully last. It's connected over USB, and debugging with the MCUXpresso IDE LinkServer configuration.

I have seen several people with this error, but none of the solutions have worked for me. In particular, trying to do a Mass Erase, which some have suggested, gives the same error. I have also been clicking "Clean Up Debug" after failed attempts, and power cycling the board. Also, I have verified the USB cable is good for power and data, and I get a different error (LinkServer not found) when the USB cable is actually disconnected.

Is there a way I can get it into a usable state again?

Re: Persistent Wire Ack Fault error debugging MIMXRT1060-EVKB

mayliu1 — Wed, 08 Apr 2026 10:00:45 GMT

Hi @rdmikkelsen ,

Thank you so much for your interest in our products and for using our community.

I suggest you can try to use SEC tool to recovery your board.

https://www.nxp.com/design/design-center/software/development-software/mcuxpresso-software-and-tools-/mcuxpresso-secure-provisioning-tool:MCUXPRESSO-SECURE-PROVISIONING

Please download and install this tool, and follow the steps (2.2 SPT Mass Erase) shown in below link.

https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs-Knowledge/RT-board-recovery-for-debugger-connect-issues/ta-p/1635260

Please try it.

Best Regards

May Liu

Re: Persistent Wire Ack Fault error debugging MIMXRT1060-EVKB

rdmikkelsen — Wed, 08 Apr 2026 18:02:59 GMT

Thank you for linking this tool and the steps to use it! This has worked for me more than once already today, so this seems to be a reliable solution.

Re: Persistent Wire Ack Fault error debugging MIMXRT1060-EVKB

mayliu1 — Thu, 09 Apr 2026 02:11:21 GMT

Thank you for your feedback. I am glad your problem has been resolved.

If you meet any issue in the future, welcome to create the new question post.