WinAPI Required in USES after "Delete Invalid Paths"

[egnew 3]

I deleted invalid paths in "tools options language Delphi library" for "library path", "browsing path", and "Debug DCU path" in both Win-32 and Win-64.   Compiling units with "Window" in the use clause fails with the message "[dcc32 Fatal Error] Form.pas(10): F2613 Unit 'Windows' not found."  Any unit from WinAPI such as Messages results in similar fatal errors.

 

I can bypass the error by using "WinAPI.WIndows, WinAPI.Messages," instead of "WIndows, Messages".  System units such as "SysUtils" can still be used without the need to qualify as "System.SysUtils". 

 

I am using RadStudio 11 Alexandria..  Is there a way to resolve this issue without reinstalling?

 

Thanks

[Stano 143]

Deleting invalid roads has in the past led to the complete collapse of the IDE. I strongly recommend using qualified unit names. You will avoid this problem. For new units, it is quite often a duty.

[SwiftExpat 65]

Check your unit scope names, it is under project, options.