which situation does'error C2039' happen?

when i compile my code,i get this error

error C2039: 'Import3dmax3DS' : is not a member of 'C3dWorld'
see declaration of 'C3dWorld'

but i have define 'Import3dmax3DS' in 'C3dWorld'

which situation does 'error C2039' happen

azuomar
Is there a chance that the definition is excluded due to a #ifdef/#endif part.
Itai R
it went wrong here

......

C3dObject* pObject = m_pWorld->Import3dmax3DS(szPath, FALSE);

......

and i declare it here

class AFX_EXT_CLASS C3dWorld : public CObject
{
DECLARE_DYNAMIC(C3dWorld);

......

C3dObject* Import3dmax3DS(LPCSTR lpszFileName, BOOL bAddToList=TRUE);

......

t
aviatordave
Show us some code. Deklaration of the class, and some llines were the error occurs.
CharlesGDL
In a case like this I would preprocess the file and make sure that the compiler can really see the declaration. Also with "compilcated" identifers like this I would double (and triple) check that it is spelt correctly: though from what I can see above it appears to be.
YESChandana
that's not the order

class AFX_EXT_CLASS C3dWorld : public CObject
{
DECLARE_DYNAMIC(C3dWorld);
......
C3dObject* Import3dmax3DS(LPCSTR lpszFileName, BOOL bAddToList=TRUE);
......
}

C3dObject* C3dWorld::Import3dmax3DS(LPCSTR lpszFileName, BOOL bAddToList)
{
......
}

C3dObject* pObject = m_pWorld->Import3dmax3DS(szPath, FALSE);
Rassol
If this is really the order in which your code is arranged then the error message is because you are using the field before you have declared it.
Nachiket
after rebuild all(it takes a lot of times),it works

thank you all
which situation does'error C2039' happen?