In Default.ReaperOSC (4.16 pre 26):
Code:
DEVICE_FX_PARAM_COUNT i/device/fxparam/count t/fxparam/count/@
... the t/ pattern seems to be missing the /device bit. It probably should be:
Code:
DEVICE_FX_PARAM_COUNT i/device/fxparam/count t/device/fxparam/count/@