Here is an example curl request from the OLFS regression tests, it used to work but now returns a libdap error:
code = 500;
message = "libdap exception building response: error_code = 1002: libdap error transmitting DDS: An internal error was encountered:
Unimplemented BaseType::read() method called for the variable named: SST
Please report this to email@example.com";
Probably this is a side effect of the recent changes we made to the DAS colliding with the geogrid heuristic.