> Source: [sk123297](https://support.checkpoint.com/results/sk/sk123297)

# sk123297 - Upgrade failed for SMB appliances from R77.20.20 to higher version

| Property | Value |
|----------|-------|
| Solution ID | sk123297 |
| Date Created | 2018-04-12 |
| Last Modified | 2021-05-24 |
| Technical Level | Advanced |
| Products | Spark Firewall (Locally Managed) |
| Versions | R82.00.X, R81.10.X |
| Platform | 910 |

## Symptoms

- Upgrade of SMB appliance failed with the following error messages:   

`Error: Cannot import settings from the old image (2)`  
`
Executing command: '/bin/sync'`  
`
Executing command: '/bin/umount /mnt/inactive'`  
`
umount: cannot umount /mnt/inactive: Device or resource busy`  
`
Executing command: '/opt/fw1/bin/cp_write_syslog.sh -p er r [System Operations] Failed to upgrade the appliance software version'`  
`
Executing command: '/bin/rm -rf /fwtmp/upgradeRevertInPro gress'`  
`
Exiting with error code -1.`

## Cause

Upgrade path is not supported. For example, you cannot upgrade from R77.20.20 to R77.20.51. First you should upgrade to R77.20.31 and from there to R77.20.51.

## Solution

This solution requires authentication. Please log in to view the full solution.

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content