I have .DCU but not .PAS

Question

I am migrating some software from Delphi 6 to RAD 10.3. I have a line of code that I am receiving an error on and am not really sure how to resolve it. The line is:

uses LMDSpeedButton, ExtCtrls, StdCtrls, LMDEdit,ovcsf, Forms, ovcmeter,SDL_replis

The error I am seeing is:

[dcc32 Fatal Error] ScreenResolution.pas(25): F2613 Unit 'SDL_replis' not found.

I searched for SDL_replis and found the SDL_replis.dcu but not .PAS. It is my understanding that when using "uses" I need to have the .PAS. Is that correct and how do I get past this?

Answer 1

It is my understanding that when using "uses" I need to have the .PAS. Is that correct

No. The compiler will use a .dcu file if found, and then fall back to a .pas file if needed.

However, .dcu files are version-specific. So, you can't use a D6 .dcu file in RS10.3. If you don't have the original .pas file to recompile the .dcu in RS10.3, and can't otherwise install an updated version of SDL into RS10.3, then you are likely out of luck. Your only option would be to write a .dll in D6 that wraps the desired logic from the .dcu, and then use that .dll in RS10.3.