Why does the findstr command return nothing in cmd?

Question

cmd/bat

Writing

C:\Users\Melnikov-iv\Desktop>findstr /C:"SID" temp.txt >out.txt 2>error.txt

,
but the command returns nothing (files out.txt and error.txt are empty).
The temp.txt file exists, is located in \Desktop, and one of the lines contains the substring "SID".

Answer 1

Before findstrexecute:

rem Перекодировка файла в UTF-16 c BOM(!) в текущую кодировку консольного окна
cmd /a /c type temp.txt >temp2.txt
move /y temp2.txt temp.txt

See e.g. CMD/BAT: Recoding Text Files for an understanding .
However, it is possible to recode on the go:
or
or
In the end, you can findstruse instead find:
find "SID" <temp.txt >out.txt 2>error.txt