"ValueError: could not convert string to float: b'0,000000'" when import obj file Imported obj file of a OSM 
size 22 Mb

Is it a bug?

The significant trace in plain text: "ValueError: could not convert string to float: b'0,000000'" with the ',' (instead of '.') can be seen.
Yes, i opened MTL file with Notepad and replaced all the "0,0" expressions with "0.0" and it is working now