[Error] cxVariants.pas(353): Undeclared identifier: 'FindVarData'

安装DevExpress.ExpressQuantumGrid时，一下包都安装上去了，但装到ExpressDataController时，报错
[Error] cxVariants.pas(353): Undeclared identifier: 'FindVarData'
[Error] cxVariants.pas(353): Pointer type required
[Error] cxVariants.pas(364): Undeclared identifier: 'FindVarData'
[Error] cxVariants.pas(364): Pointer type required
[Error] cxVariants.pas(364): 'END' expected but ')' found
[Fatal Error] cxCustomData.pas(43): Could not compile used unit '..\Sources\cxVariants.pas'
无法继续安装
请问如何解决？谢谢