How to substract bussed analog signals ?

Hi,

I am facing the following issue with Maestro Assembler / Explorer.

- Output # 1 is [ Test_1 = vtime('tran "/RFFE/HPPA/CORE/CHANNEL<3>/lo_pmos_msb<30:0>") ]. This is actually a bus of 31 analog waveforms. This output is correctly evaluated by Assembler.

- Output # 2 is [ Test_2 = vtime('tran "/RFFE/HPPA/CORE/CHANNEL<3>/MSB<30:0>/local_vss") ]. This is again a bus of 31 analog waveforms, which evaluates correctly.

All waveforms are from the same transient simulation : They share the same time-points.

Now, If I declare a third output as [ Test_3 = Test_1 - Test_2 ], I would expect Test_3 to be a bus of 31 waveforms with [ Test_3<i> = Test_1<i> - Test_2<i>, ], but it fails to evaluate.

Any idea to solve this ?

Thanks

/Guillaume