Dim Labels in MxtrixOP

Is it possible to use dim labels in matrixOP

such as

MatrrixOP/FREE tempw= row(Input,%Param1)
As a rule, MatrixOP does not support anything outside the raw data of the wave.

WaveMetrics, Inc.
I think you can do something like this:
Variable index = FindDimLabel(Input, 0, "Param1" )
MatrixOP/FREE tempw= row(Input,index)