---
title: "Discussion on \"Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime (\"Checkpoint deserialization blocked\")\" | Hashnode"
description: "Discussion on \"Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime (\"Checkpoint deserialization blocked\")\". A workflow checkpoint with a ZoneInfo-aware datetime fails to save to file, even with zoneinfo:ZoneInfo allowlisted. Repro on 1.25.0 and what to store instead."
url: "https://hashnode.com/posts/microsoft-agent-framework-filecheckpointstorage-zoneinfo-deserialization-blocked/6af492ec2ffc43b2bf5a4e45"
---

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# [Microsoft Agent Framework: FileCheckpointStorage can't save a ZoneInfo datetime ("Checkpoint deserialization blocked")](https://memorysync.hashnode.dev/microsoft-agent-framework-filecheckpointstorage-zoneinfo-deserialization-blocked?utm_source=hashnode&utm_medium=feed)

A workflow checkpoint with a ZoneInfo-aware datetime fails to save to file, even with zoneinfo:ZoneInfo allowlisted. Repro on 1.25.0 and what to store instead.

20h ago · 6 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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