compute rdf :ERROR: Numeric index

Dear All,

I tried to make amorphous silicon dioxide by new version of LAMMPS and calculate the RDF by newest version of LAMMPS. Previously I did the same thing with old version of LAMMPS (2007). In the old version, to calculate RDF we use “fix” command, while newest versio uses “compute”. But, using newest version ERROR messsage appears as follow:

three last lines of log file

Please see the compute rdf doc page for correct usage of the command: