I try upgrading two different catalogs from Elements 13 to Lr 6. / Windows 7
FIRST catalog can be imported. However when I try to upgrade my SECOND catalog from Elements 13 to Lightroom 6 I get an error message "Lr encountered problems when trying to upgrade the PE catalog and cannot complete the operation". I have run Optimise and Repair for the Elements catalog but still have no success. Thoughts on what to do next would be appreciated, either to fix the problem or on how to use my existing catalog in Lr.