Thread:Project:Support desk/Error: 1146 Table 'bighead3 wiki.objectcache' doesn't exist (localhost)/reply (4)

It is correct that manually adding the table should add it to the database, but I am not sure, if this solves your real problem.

It would be interesting to know, why this table is actually missing. If your database is corrupted at one place already, there might well be other problems with it as well. If it was my wiki, I would take an unbroken backup and continue with that.