delphidelphi-xe7delphi-10.3-rio

Upgraded Custom Component won't compile

We're currently looking at upgrading some of our Delphi applications from XE7 to 10.3 and have run into a problem with our custom components.

I've tried 2 options.

  1. I've copied, opened in 10.3, and re-compiled the original component package.

  2. I've created a new package in 10.3, added a copy of the relevant .pas files, and compiled a new .bpl/.dpk file.

In both cases, I get a package that I can install into the IDE, and which allows me to add the component into a new project.

However, in both cases, I get "Can't resolve unit name "NewComponent"" in the IDE, and "Unit "NewComponent" not found" when I try and use the component in the project.

I remember this being an issue on previous Delphi updgrades, but have forgotten the trick to fix it.

Solution

  • For my own packages, I have a separate Lib folder \[delphi]\Lib2, then I set the BPL Output Directory in the IDE to that folder, add it to the IDE's Search Path and the OS Path.

    That's all I find is necessary and it works fine.