I just upgraded from 11.2.4 to 12.2.4 and when I tried to rebuild my project I got:
[Linker Error] Invalid resource file (2) '…\Components\DevEx\Library\RS11\cxControls.res'
[Linker Error] Invalid resource file (4) '…\Components\DevEx\Library\RS11\dxLayoutControl.res'
[Linker Error] Invalid resource file (4) '…\Components\DevEx\Library\RS11\cxInsCur.res'
please fix those resource files by setting neutral language there