Don't use such long names.
Even with single character "variables" you are still looking at over 60 characters for your string:
reqvehicleregistrationname: "?",reqvehicleregistrationpath: "?"
So with pretty much any kind of file path you are going to exceed 120 characters very quickly.
If you need a shorter string, shrink the content. And that means not using most of it for names, I'm afraid!