Hi, I'm a new user of Ginac and I have found a problem. I need to define an indexed object with six indices or more. However, for an indexed object with more than four indices the compilation returns an error. A simple example is: symbol Delta("Delta"); varidx mu(symbol("mu"),4), nu(symbol("nu"),4), alpha(symbol("alpha"),4), beta(symbol("beta"),4), sigma(symbol("sigma"),4), lambda(symbol("lambda"),4); ex e = indexed(Delta,mu,nu,alpha,beta,alpha,beta); cout << e << endl; returns a compilation error like this "error: no matching function for call to 'GiNaC::indexed::indexed(GiNaC::symbol&, GiNaC::varidx&, GiNaC::varidx&, GiNaC::varidx&, GiNaC::varidx&, GiNaC::varidx&, GiNaC::varidx&)" Is there a way to define an indexed object with more than four indices in Ginac? Thanks, Gilson.