Got exception when deserialise xml data

I got this exception : "libc++abi.dylib: terminating with uncaught exception of type boost::archive::archive_exception: input stream error-No such process terminating with uncaught exception of type boost::archive::archive_exception: input stream error-No such process (lldb) " in my program when deserialize from xml file.

My program :

#include<iostream>
#include<fstream>
#include<boost/archive/xml_oarchive.hpp>
#include<boost/archive/xml_iarchive.hpp>

int main(){
    std::string fname = "file.xml";

{
    std::string a("hello world");
    
    std::ofstream of(fname.c_str());
    boost::archive::xml_oarchive of_xml(of);
    of_xml << BOOST_SERIALIZATION_NVP(a);
    
    of.close();
    
}

{
    std::string b;
    std::ifstream inf(fname.c_str());
    boost::archive::xml_iarchive inf_xml(inf);
    inf_xml >> BOOST_SERIALIZATION_NVP(b);
    
    inf.close();
    
    std::cout<<"string is : "<<b<<"\n";
}


return 0;
}

How to handle this exception guys?