---
title: "Discussion on \"Mastra 'invocation.errorText?.trim is not a function': fixed in @mastra/memory 1.39.1\" | Hashnode"
description: "Discussion on \"Mastra 'invocation.errorText?.trim is not a function': fixed in @mastra/memory 1.39.1\". A stored failed tool call with an object-valued errorText stopped Observational Memory on every later turn. Upgrade, and mind the @mastra/core peer bump."
url: "https://hashnode.com/posts/mastra-observational-memory-errortext-trim-is-not-a-function/6af1f284708c8fd780a14add"
---

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# [Mastra 'invocation.errorText?.trim is not a function': fixed in @mastra/memory 1.39.1](https://memorysync.hashnode.dev/mastra-observational-memory-errortext-trim-is-not-a-function?utm_source=hashnode&utm_medium=feed)

A stored failed tool call with an object-valued errorText stopped Observational Memory on every later turn. Upgrade, and mind the @mastra/core peer bump.

4d ago · 4 min read · memorysync.hashnode.dev  
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Building MemorySync (memorysync.io) — persistent memory infrastructure for AI agents, Cursor, and Claude Code.

Building MemorySync (memorysync.io) — persistent memory infrastructure for AI agents, Cursor, and Claude Code.

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