Archive.exe do not exist. I then look in my Coh2 folder and there was only a short cut of the file. I then try to making a new map and export it from worldbuilder. Still same file was missing, so it was not the map in worldbuilde.
So for some reason the file "Archive.exe" - has been deleted.
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Solution to this problem is simple.
Step 1 : Open up your steam library and find COH2.
Step 2. : Right clik on COH2 and find property manager.
Step 3. : In the menu Property manager find local file , it should be the 3nd fane just after update op top.
Step 4. : Nr 4 on the list should be Verify file game integrity.
Step 5 . : The files for COH2 will now be check and the archive.exe will be install if missing.
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Hope this will help others.
Cheers from Von_Smedman