RemoveFromCharacter: CItem::RemoveFromCharacter: Invalid Item Position

[ShyD 35]

hey guys, i have this error in my first core from ch1... any idea ? i did not changed anything in this function...

LPITEM CItem::RemoveFromCharacter()
{
	if (!m_pOwner)
	{
		sys_err("Item::RemoveFromCharacter owner null");
		return (this);
	}

	LPCHARACTER pOwner = m_pOwner;

	if (m_bEquipped)	// �����Ǿ��°�?
	{
		Unequip();
		//pOwner->UpdatePacket();

		SetWindow(RESERVED_WINDOW);
		Save();
		return (this);
	}
	else
	{
		if (GetWindow() != SAFEBOX && GetWindow() != MALL)
		{
			if (IsDragonSoul())
			{
				if (m_wCell >= DRAGON_SOUL_INVENTORY_MAX_NUM)
					sys_err("CItem::RemoveFromCharacter: pos >= DRAGON_SOUL_INVENTORY_MAX_NUM");
				else
					pOwner->SetItem(TItemPos(m_bWindow, m_wCell), NULL);
			}
#ifdef ENABLE_SWITCHBOT
			else if (m_bWindow == SWITCHBOT)
			{
				if (m_wCell >= SWITCHBOT_SLOT_COUNT)
				{
					sys_err("CItem::RemoveFromCharacter: pos >= SWITCHBOT_SLOT_COUNT");
				}
				else
				{
					pOwner->SetItem(TItemPos(SWITCHBOT, m_wCell), NULL);
				}
			}
#endif
			else
			{
				TItemPos cell(INVENTORY, m_wCell);
#ifdef ENABLE_SPECIAL_INVENTORY
				bool defaultSpecialInventoryPosition = GetSpecialInventoryType() != -1 && cell.IsSpecialInventoryPosition();
				if (false == cell.IsDefaultInventoryPosition() && false == cell.IsBeltInventoryPosition() && false == defaultSpecialInventoryPosition)
#else
				if (false == cell.IsDefaultInventoryPosition() && false == cell.IsBeltInventoryPosition())
#endif
					sys_err("CItem::RemoveFromCharacter: Invalid Item Position");
				else
				{
					pOwner->SetItem(cell, NULL);
				}
			}
		}

		m_pOwner = NULL;
		m_wCell = 0;

		SetWindow(RESERVED_WINDOW);
		Save();
		return (this);
	}
}

this is my remove item function

[PeaceMaker 143]

You can't just say you have a problem and throw a piece of code and expect people to guess it.

Start by describing the issue and specify when or how does it occur.
And provide some more information such as syserr, syslog or preferably a stack dump from your core file...