Loading matrix param from Excel table in GLPK

Hi,

I want to pass matrix values contained in excel file or csv to a
matrix parameter, for example, Excel table:
         AGU    CEN
ITU      5    6
PMO   7    8



So that I can read  through the parameter traffic:

traffic[ITU,AGU]=5
traffic[PMO,AGU]=7
...

In the real case there are many values.

For this, I made the following code, but it did not work:

set C1;
set C2;
param traffic_st{C1,C2} >=0;

table data IN "CSV" "traffic_st1.csv":
[i ~ C1], {j in C2} <traffic_st[i,j] ~ (j)>;

and I define C2 in .dat file like:

set C2:=AGU CEN;


Thank you in advance for your help


Best regards.
Rodolfo