Why are my units “compiled with a different version” of my own files?

Question

I\'m building a program that uses plugins. Unfortunately, the plugin framework\'s dynamic linking forces the RTL and VCL out of my project EXE and into the BPL versions, an

Answer 1

1. Your actual .dpr file contains a reference to an incorrect version of a .pas file.

   View > Project Manager > expand tree and examine the path of all the units.

2. There is a duplicate file in the list of search paths, and the incorrect version is found first

Answer 2

For future reference, simply pointing the compiler to source-code versions of the "problem units" fixed this for me (i.e. adding the folders containing the source code to the search path).