r1860 reads only 1 GRU from the DDB despite multiple present.

[cooperalbano]

This does not occur with r1813. Investigating. Will update.
Produced using BowAtLouise example here:
https://github.com/cooperalbano/MESH-vector-simple-example

[cooperalbano]

the "GRU" dimension must be capitalized. However, the dimension and variable cannot be the same. So, the variable must become "gru" and the dimension "GRU".

Fix is coming.