Thanks Narcís

The problem is solved...

The Project\Options\Directories/Conditionals\Search_Path part did the trick.

=:)

Jan

Hi All I'm completely stumped, and I'm looking for troubleshooting advice. Having installed TeeChart Pro 7.06 under Delphi 2006 SP2 gives a fatal compile error when trying to build our project: [Pascal Fatal Error] Data_Init.pas(7): F2051 Unit Chart was compiled with a different version of TeeConst....