flatten.py BoxSelection tests fail on Windows

[biagas]

Describe the bug

Here is the test function in flatten.py:

def test_box_selection():
    # These test verify that the Query operates on
    #   the actual data and not the original
    # A second test is used to test the non shared
    #   memory implementation since the data is small.
    TestSection('BoxSelection')
    test_box(False)
    TestSection('BoxSelectionNoSharedMemory')
    test_box(True)

The second call to test_box is what fails. You can change the order, and it will still be the second call that fails. There seems to be some kind of remnants from the first call to test_box interfering with the second.

Expected behavior

The test should succeed as it does on Linux.

Desktop

• OS and version: Windows 10
• VisIt Version: develop (3.3)
• Server info (if applicable):