You may report problems with ns4decode by sending an email to the address provided in the User Manual. Thanks!
Version 1.42 of the Nord Stage 4 has a bug associated with morphable parameters that can cause a value to be displayed incorrectly when using the MON button. If you observe a discrepancy between the value displayed by the instrument when using the MON button and the value reported by ns4decode, try this instead: while holding a morph button (WHEEL, A.T., or CTRLPED), press and hold the MON button, and while holding both of those buttons, move the slider/knob for the parameter in question. The value displayed in the From field should agree with the value reported by ns4decode.