Recorder for shear modulus reduction curve

[lindaatik]

Hi,

I am using the PressureDependMuliYield nDMaterial and I am trying to record the backbone curve for one element as specified in the user manual:
recorder Element -ele 36 -file Output/soil_dyn_backbone.out -dT $deltaT material 2 backbone 20000;

According to the manual, "In the output file, corresponding to each given confinement there are two columns: shear strain and secant modulus Gs. The number of rows equals the number of yield surfaces."
Instead of the two columns, I am getting many columns of data. None of the columns seems to be recording shear strain, since all the numbers are very large. Also, all the rows are identical.

Can you please help me figure out what's going on?

Thanks in advance,
Linda.