diff --git a/lib/algorithm.js b/lib/algorithm.js
index f64758b..62fc7c6 100644
--- a/lib/algorithm.js
+++ b/lib/algorithm.js
@@ -235,6 +235,7 @@ class Algorithm {
     const accountMsgs = []
     for (const [accountID, tips] of accountTips) {
       const accountTangle = this.#peer.db.getTangle(accountID)
+      if (!accountTangle) continue
       accountMsgs.push(...accountTangle.slice([], [...tips]))
     }
     return accountMsgs
@@ -275,6 +276,7 @@ class Algorithm {
       msgs.push(rootMsg)
     }
     const tangle = this.#peer.db.getTangle(rootID)
+    if (!tangle) return msgs
     for (const msg of tangle.slice()) {
       const depth = msg.metadata.tangles[rootID]?.depth ?? 0
       if (depth >= minDepth && depth <= maxDepth) {
@@ -300,6 +302,7 @@ class Algorithm {
       typeof m === 'string' ? m : MsgV4.getMsgID(m)
     )
     const tangle = this.#peer.db.getTangle(rootID)
+    if (!tangle) return []
     return tangle.slice(msgIDs, [])
   }
 
@@ -312,6 +315,7 @@ class Algorithm {
    */
   async pruneNewest(rootID, count) {
     const tangle = this.#peer.db.getTangle(rootID)
+    if (!tangle) return
     const sorted = tangle.topoSort()
     if (sorted.length <= count) return
     const msgID = sorted[sorted.length - count] // New "oldest dataful msg"