---
title: "system.sfc.redundantCheckpoint"
description: "Synchronizes chart and step variables of the specified chart instance across a redundant cluster, allowing the chart instance to continue where it left off if a redundant failover occurs."
---

# system.sfc.redundantCheckpoint

> Synchronizes chart and step variables of the specified chart instance across a redundant cluster, allowing the chart instance to continue where it left off if a redundant failover occurs.

This function is used in **Python Scripting**.

## Description
Synchronizes chart and step variables of the specified chart instance across a redundant cluster, allowing the chart instance to continue where it left off if a redundant failover occurs. Check out [redundancy sync](sequential-function-charts\SFC-basics\chart-properties.md#redundancy-sync) for more information.

## Client Permission Restrictions
[Permission Type](projects\project-properties\project-properties.md#client---permissions): SFC Management

Client access to this scripting function is blocked to users that do not meet the role/zone requirements for the above permission type. This function is unaffected when run in the Gateway scope.

## Syntax
`system.sfc.redundantCheckpoint(instanceId)`

### Parameters

|Type|Parameter|Description|
|--|--|--|
|String |`instanceId` |The instance identifier of the chart.|
### Returns
Nothing
### Scope
All