If I want to combine gmpe (logic tree) but both cover different spectral period ranges, gmpe1: 0.0 -3.0 [s] and gmpe2: 0.0 - 10 [s] only the minimum spectral period range can be analyzed, that is, 0.0 - 3.00[s] and the other thing that happens if both gmpe have different coefficients, let me explain gmpe1: pga, 0.1, 0.4, 0.5 ... and gmpe: pga, 0.2, 0.4, 0.5 ... the software allows to analyze the period 0.1.
Regards.
