[netcdf-java] Problem reading HDF files

Hello,

the code

        String path = groupInFile + SUBDATASETS_GROUP_DELIMITER + nameInGroup;
        Variable findVariable = file.findVariable(path);

Worked with netcdf-4.2 Java lib but does not with netcdf-4.3 and 4.5
(returns findVariable = null)
What is the problem?