Quadrature not working for linear encoder

Hello All,

I have an application where I acquire counter signals from a flowmeter. This flowmeter has A and B signals like a traditional quadrature encoder.

Theese signals are wired to a PCIe-6612 counter board.

I have discovered that when I select the linear encoder instance of the "DAQmx Create Virtual Channel.vi" and set it as X4 decoder, it's not working. It behaves as a X1 counter.

I have to select the Angular encoder instance instead to have the X4 decoding working properly.

Is it a bug or a known behaviour?

Regards