alogrep 0 Posted 3 hours ago HI. I receive this error (delphi 12,3): F2051 Unit VCLTee.TeeProcs was compiled with a different version of Vcl.Menus.TPopupMenu I searched for Vcl.Menus.TPopupMenu.* but nothing exists on the PC. I searched all the VCLTee.TeeProcs.dcu on the PC (attached file (tee.txt) The only menus file I got is Vcl.Menus.pas, which I included in the app. I tried various combinations of the vcltee in the search path, but none seems to work. By the way, in C:\Program Files (x86)\Embarcadero\Studio\23.0\lib\win32\release C:\Program Files (x86)\Embarcadero\Studio\23.0\lib\win64\debug what the win32/win64 refer to? The O.S. or the app developed (in 32 bit or 64bit)? Also. i should use the dcu from the debug folder in 23.0 if i am compiling my app in debug mode and the one from the release folder in 23.0 if i am compiling in release mode? tee.txt Share this post Link to post