SetOccDialogInfo linker error VC 6.0 MFC

I got few of these linker errors in my application.
I have reloaded the VC 6.0 - no SP packs yet and build a simple MFC ( all defaults) application and now I am getting same linker error.
I have not changed anything, using default setting.
I am guessing some library got "corrupted", but which one?

Any clue what is happening here?


Linking...
ChildFrm.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall CWnd::SetOccDialogInfo(struct _AFX_OCC_DIALOG_INFO *)" (?SetOccDialogInfo@CWnd@@UAEHPAU_AFX_OCC_DIALOG_INFO@@@Z)
MainFrm.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall CWnd::SetOccDialogInfo(struct _AFX_OCC_DIALOG_INFO *)" (?SetOccDialogInfo@CWnd@@UAEHPAU_AFX_OCC_DIALOG_INFO@@@Z)
TSET2View.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall CWnd::SetOccDialogInfo(struct _AFX_OCC_DIALOG_INFO *)" (?SetOccDialogInfo@CWnd@@UAEHPAU_AFX_OCC_DIALOG_INFO@@@Z)
Debug/TSET2.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.


Any help as always will be appreciated. Thanks for your time.








Addendum
Dialog based MFC application compiles just peachy, only SDI and MDI have this linker issue.

Vaclav