Update "ERROR: problem finding GlobalNodeID" message to make it useful

[ktbolt]

A user saw the following error message when writing out simulation files

"ERROR: problem finding GlobalNodeID"

and had no idea what it could possibly mean: What is GlobalNodeID? What could the problem be?

After getting the user's project, looking in the svSolver source and adding print statements I finally determined that svpre failed to read the GlobalNodeID data array from an input VTK .vtp file for an inlet BC.

Just adding the name of the file svpre was trying to read GlobalNodeID from would have saved the user and me a lot of time.