Use custom mupping not work

Hi. I searched this forum for information, maybe I couldn’t find it. It seems that “custom mapping” cannot be made to work. I created my own variable “MOD_RPM” via xml and passed the engine speed to it. I put it next to the regular ID37 variable so that I could see the difference. I have changed the “custom mapping” parameters for my variable in the application. but it gives me unchanged data, as if custom mapping was not enabled. Please explain how to work with it, I’ve tried both terminal and interpolation, nothing helps.

The problem is solved.