The program produces an error during operation.

[Fireman_Jeck]

When rendering comes to KNN and fails.

[Roberto]

Hi Fireman Jeck,

can you please send us the log?

You can find the log files in this folder:
https://www.3dflow.net/technology/documents/3df-zephyr-tutorials/how-to-locate-3df-zephyr-log-files/

Do you see this warning in the log:

[19:58:55] Warning: SSE4 not found. Preemptive match will not be used.
[19:58:55] Warning: problem computing descriptors signatures. Preemptive matching will be disabled.
[19:58:55] Done.
[19:58:55] Finding candidate pairs.
[19:58:55] Unhandled exception. Code: 0

We are aware of the issue and we are fixing it. It happens on old cpus without the SSE4 extensions (6 years old). We'll probably push a new version with the fix later today. Thanks for reporting it.

[Roberto]

We have just pushed an update (v. 3.002) that should have solved the problem. Please let me know if you are still experiencing issues.