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C++ VS linking error while build 64bit

P: 1
I am using Visual Studio 2005.
I am able to build 32bit without issue. But when I am building
64bit version, I am getting below linking error:

1>QALPROC.exp : error LNK2001: unresolved external symbol "const CustomMessageException::`vftable'" (??_7CustomMessageException@@6B@)
1>QALPROC.exp : error LNK2001: unresolved external symbol "const DBException::`vftable'" (??_7DBException@@6B@)
1>QALPROC.exp : error LNK2001: unresolved external symbol "const Exception::`vftable'" (??_7Exception@@6B@)
1>QALPROC.exp : error LNK2001: unresolved external symbol "const FileExportLoadException::`vftable'" (??_7FileExportLoadException@@6B@)
1>QALPROC.exp : error LNK2001: unresolved external symbol "const PMemoryException::`vftable'" (??_7PMemoryException@@6B@)
1>QALPROC.exp : error LNK2001: unresolved external symbol "const ReportsLoadingException::`vftable'" (??_7ReportsLoadingException@@6B@)

Please help!!!
thanks
Dec 5 '13 #1
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