Slow work of rotary axis

Do a google search on how to fix file permissions in linux, but do be careful, there are a lot of things that can be messed up with that.

get error 127 "file not found".
I tried 777, 755 and 666.
I don't understand why I get that filter.py file not found. It's present and pass is written to configs folder.
File has complite permissions now -rwxrwxrwx

I get exactly this error, when the path to the filter is not correct, example '/home/NcFiles/Filter/filter.py'

I checked my problem more presicely.
If permissions has number 7 (mean x-execute), then I get error 127 "file not found".
If I set permissions with number 6, then I get error 126 "permisions denied".

Possibly, problem is in something else.
in the directory usr/bin/.. I don't have file python, but files python2.6 and python2.8

Or could be problem that linuxcnc doesn't have permissions?
I had problem with reading python files by linuxcnc in the past. I didn't solved that problem.

Did you check permissions for the folder where the file is located ?

I checked, folders has permissions read & write.
I also replace file.py to user/ and also tried. I got the same result, not matter what folder is.