Calculator does not work with partial arrays

We have an error message that an important user is seeing. Here is how to replicate:

Windows, local server, 5.6.0.
Open file ion-electron-plasma/f.ex2.20.*. All variables on. All Sets on. Apply.
Calculator. Change Attribute Type to Cell Data. Formula is "mag(E_el_const_)" without the quotes, obviously. Apply.

I'm targeting 5.7.0 if this is trivial, OK to move to 5.8.0, i.e., fall.

The following errors occur, but then things seem to work correctly. BE SURE TO TEST IN PARALLEL.

@utkarsh.ayachit @cory.quammen ask me for the data. Note to myself - Windows/ Tom H/ ion-electron-plasma. UURable.

ERROR: In C:\bbd\ecd3383f\build\superbuild\paraview\src\VTK\Common\Misc\vtkFunctionParser.cxx, line 1244 vtkFunctionParser (00000220A70FE380): Syntax error: expecting a variable name; see position 4

Warning: In C:\bbd\ecd3383f\build\superbuild\paraview\src\VTK\Filters\Core\vtkArrayCalculator.cxx, line 376 vtkPVArrayCalculator (000002209E608F30): An error occurred when parsing the calculator's function. See previous errors.

Edited Apr 05, 2019 by Utkarsh Ayachit

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information