Ambiguous Name Detected With Constant

Option Explicit
Public Const ARK As String = "Inddata-ARK"
Public Const VVS As String = "Inddata-VVS"
Public Const KON As String = "Inddata-KON"
Public Const EL As String = "Inddata-EL"
Public Const LD As String = "Inddata-LD"
Public Const KØL As String = "Inddata-KØL"
Public Const OpDat As String = "Opdatering"

And then macro's under it... So the aboce is in module "INIT_S". Now in another module "RUN_P" I have a sub-rutine that uses these constants with a select case.
Likes this:

Sub OpEksInitNu()
Select Case ActiveSheet. Name
Case ARK
With OpEks
'more stuff
Case VVS
'more stuff
Case KON
'more stuff
End Sub

But when I try to run OpEksInitNu i comes with ambigious name with ARK as the error, later down I use another public constant. But i keep getting the ambigious name error.. What could cause that... I have tried to locate all ARK, VVS etc. to try to determine if it is used later on, but it's not! I only declare the constants one time, and no module is called ARK, VVS etc.