---
title: "October 2026 - Version 3.56"
slug: "version-356"
updated: 2026-10-14T13:52:40Z
published: 2026-10-14T13:52:40Z
canonical: "docs.blackthorn.io/version-356"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blackthorn.io/llms.txt
> Use this file to discover all available pages before exploring further.

# October 2026 - Version 3.56

Please review the updates below and follow the upgrade instructions to upgrade your Messaging application.

## Table of Contents

*(Release Date: October 13, 2026)*

- [Bug Fixes](/v1/docs/version-356#bug-fixes)
- [Field/Layout Updates](/v1/docs/version-356#fieldlayout-updates)
- [Upgrade Instructions](/v1/docs/version-356#upgrade-instructions)

## Bug Fixes

### Scheduled bulk SMS sends

- You can now schedule an SMS send to a large Campaign without an error. Previously, scheduling a send to a Campaign with more than about 100 Contact members showed the error "STRING_TOO_LONG, Recipient List: data value too large," even though the messages still went out at the scheduled time.
- If a scheduled send can't be saved, it is now canceled and the on-screen message tells you that no messages will be sent. This applies to sends scheduled from a Campaign and from a list view. Previously, you could see an error while the send stayed scheduled and went out anyway.

**Tip:** Sends that showed this error before you upgraded were still scheduled. You can find them in the scheduled jobs list on the **Messaging Admin** tab.

## Field/Layout Updates

This release has no new or changed objects, fields, page layouts, or permission sets.

**Note for Salesforce admins:** For very large scheduled sends, the **Recipient List** field on the **Scheduled Message Job** record may list only the first recipients. This field is a reference copy and does not change who receives the message.

## Upgrade Instructions

Go to the Blackthorn [Candy Shop](https://candyshop.blackthorn.io/products) to upgrade Messaging to the newest version.