_nearposSB is not created in initialisation of _InputWidget class in /tomwer/gui/reconstruction/axis/radioaxis.py
I think that the code below could build the missing entry for the nearpos parameter
self._nearposSB = qt.QSpinBox(self)
self._nearposSB.setRange(-40000, 40000)
self._nearposSB.setValue(0)
self._nearposSB.setToolTip("position to be used with near option")
self._nearposLabel = qt.QLabel("near position", self)
self._nearposLabel.setToolTip("position to be used with near option")
self._compositeOpts.layout().addRow(self._nearposLabel, self._nearposSB)