[Paraview] ParaView 3.12: state of calculated variables not restored

[Joshua Murphy]

Hello,

I am having an issue with restoring the state of a pipeline.  I have a
pipeline that uses the calculator to calculate Density * Radius ^2, and
then displays the values on several different views (I am using a custom
plugin, if that makes a difference). When I restore the state of the
pipeline, everything restores except the values of the calculator.

For example:

To start
	* I create a pipeline that uses Density and Radius from my plugin
	* I add a calculator to calculate Density*Radius^2
	* I display the results on 2 cut planes and 1 3-D contour
	* I save the state

Load from disk
	* I load the state from disk, selecting the same data set
	* When the state finishes loading, the values in Density*Radius^2 are all
Zero.

Work Around
	* If I rename the variable for the calculator, the values are then
calculated
	* I then need to re-apply the new variable to the components

Is there something that needs to be done in my reader to ensure that these
values calculate on restoring state, or is there something wrong the
ParaView itself?

Thanks,
Josh