Star Alignment and Normalization seems to ignore Maximum Processors

[STAstro]

I have a Core i9 10 Core / 20 Thread CPU, I have defined in my config that there should only ever be 18 threads (In order to leave some compute available for other running applications), however I have noticed this morning when performing an image registration using the star alignment tool that it reported "22 Threads" which I find a little odd considering

1. I do not have 11 Cores/ 22 Thread CPU
2. I have limited PI to only perform using 18 threads

Everything else seems to run fine such as Calibration, Integration etc they are all limited to 18 threads as expected.

What information would you need, pretty re-producible

[Juan Conejero]

This is not a bug, just the expected behavior. See this thread for a detailed description of the file thread overload feature implemented in both StarAlignment and LocalNormalization.

[Juan Conejero]

See also this forum thread for a thorough analysis of multithreading in PixInsight.