I too had problems with the April and June updates, so tried February update and that loaded into my MIB2.5 Columbus system without error. On comparing the folder structure, I noticed that MIB2HIGH folder had moved up a level from February "PersonalPOI\MIB2\MIB2HIGH" to April and June's "PersonalPOI\MIB2HIGH".
Restructuring the June MIB2HIGH path to match February path is beyond me as the path to MIB2HIGH is hard coded into the top level metainfo2.txt file and those checksums look daunting!
The solution that worked, was to copy the contents of the June MIB2HIGH folder to the root of the SD Card, so it just contained the lower level PersonalPOI folder and metainfo2.txt file. I hope that this solution will be helpful to CJL and others who have the no data error message.
Many Thanks to Brigade1 for creating and maintaining this data.