[thredds] Odd errors after upgrade to 4.6.4

[David Blodgett <dblodgett@xxxxxxxx>]

THREDDS Community,

We recently upgraded to THREDDS 4.6.4 from 4.5.5. Everything seemed to go 
smoothly, but we started getting 'DataBTree doesnt start with TREE’ and other 
DataBTree errors. 

These seem to be isolated to aggregations of NetCDF4 files and the issue is 
fixed by restarting the server.

I haven’t found anything related to this error elsewhere, maybe someone on the 
list can shed some light on the situation?

Thanks.

- Dave