If you are using v8.1.0.3 or v8.1.0.4, and if you have the error while setting up multiple site s using single db, as below :
Microsoft VBScript runtime error '800a01a8'
Object required: 'dbc'
/shop$db.asp, line 4395
UpdateLayoutMgrStoreMatch
3. Please replace this line to :UpdateLayoutMgrStoreMatch connection
4. Locate below string (estimate line 4385) within routine sub UpdateLayoutMgrStoreMatchsub UpdateLayoutMgrStoreMatch
5. Please replace this line to :sub UpdateLayoutMgrStoreMatch (dbc)
6. Save the file and upload to your site.