[GiNaC-list] Runtime error

Hello I hope somebody could help me at runtime I have an error:terminate called after throwing an instance of 'GiNaC::parse_error'   what():  GiNaC: parse error at line 0, column 0: expected EOF, got: "[" [GiNaC::ex GiNaC::parser::operator()(std::istream&)(parser/parser.cpp:232)] the code is: for(int i=0; i< ramaPrim.size();i++)     {         parser reader;         ex e = reader("ramaPrim[i]");     }