We are running a private stellar network and we are seeing missing archives files. Can the network regenerate the archive files? New nodes are not able to synch because of this.
Unfortunately the archives are the canonical source of history, and at least one full non-corrupt copy must be preserved if a network is to function properly.
Archives cannot be restored from any other source, including the databases on nodes, which only store the current (most-recent) ledger state. Archives are the primary copy.