I am registered user of GridPack. I am using Delphi 2010.
I downloaded AdvNavBar demo and tried to install it to check it out. However, I get this message:
Cannot load package 'advnavbarpkgd2010.' It contains unit 'AdvStyleIF', which is also contained in package 'GridPackd2010'.
I solved this be removing 'AdvStyleIF' from the install. It then added 'GridPack'. Works now.
Perhaps a note should be added to the 'install.txt' file.
This is a known issue, explained at (for case of 2 trial versions)
and when registered versions are involved: