std::regex_error at memory location

Question

I have a regex as:

std::regex regexp(
        R"(\\$\\ part,\\ model.*[\\n\\r]([-]?[0-9]*\\.?[0-9]+[Ee]?[-+]?[0-9]*),([-]?[0-9]*\\.?[0-9]+[Ee]?[-+]?[0-9]*))&