Why does Delphi say "Unit xxx compiled with a different version of yyy" if all my paths are correct?

Question

First of all, I would like to apologize for this question. I just couldn’t do anything better. Well, then the question follows with examples and details ...

I manually installed QuickReport Delphi 2006 from my sources. It consists of two packages: "DesignTime" and "RunTime".

My Delphi is configured to collect BPL files in the "D: \ BPL" and DCP files on the "D: \ DCP" for all packages compiled on my Delphi

The QuickReport source code is located in "D: \ QuickReport", and their packages (design and runtime) are configured to save compiled units (DCUs) in the folder "D: \ QuickReport \ DCU". This was the only package configuration. Nothing is configured with different paths, and the BPL and DCP files are placed correctly in the folders that I configured, as I mentioned earlier.

With these settings, I was able to easily create and install QuickReport (just a few compiler warnings, which, in my opinion, are normal). All QuickReport components are displayed in your palette in Delphi, which does not emit any errors on startup, proving that the components are installed correctly and all packages are found.

Now comes the test: I started a new win32 application, completely empty, just an empty form. He then adds the QuickReport component (TQuickRep). The first thing I noticed is that the “QuickRpt” block, which is automatically placed in the “uses” section of the “interface”, is underlined in red, which means that something is wrong.

When I execute CTRL + ENTER in the QuickRpt block (uses the sentence), Delphi correctly finds the source file (.pas), which is located in "D: \ QuickReport", then I ran the BUILD ALL command and the following compilation error appeared:

[Pascal Fatal Error] Unit1.pas (7): F2051 The QuickRpt module was compiled with another version of QRExpr.TQREvElement

What is it!!!

This error occurs only with Quick Report. I have other third-party components installed using the same configuration as the paths, and they all work correctly.

Answer 1

Finally, I was able to solve this problem. @RRUZ, and another friend gave me advice: the lost QuickRpt.dcu file on my system. There was also a QuickRpt.res file. I found them, but the place was very unlikely for me: the LIB delphi folder !!!

Well, I have some tips about this strange thing.

Prior to Delphi 7, QuickReport was sent along with the IDE, however it is disabled by default. In this version of Delphi, all we need to do is register bpl to get full access to QuickReport!

In Delphi 2006, QuickReport is not part of the IDE and there is no BPL registration, however, the guys from Borland forget to delete all files from the old QuickReport. The Delphi Lib folder is one of the first folders that will be checked when Delphi starts, so if there are old files there, new files in another place will never be compiled, creating an annoying error!

This problem may be present at Delphi 2005.