> Source: [sk111332](https://support.checkpoint.com/results/sk/sk111332)

# sk111332 - Upgrade of 1100 appliance from R75.20 to R77.20 fails

| Property | Value |
|----------|-------|
| Solution ID | sk111332 |
| Date Created | 2016-07-11 |
| Last Modified | 2016-07-14 |
| Technical Level | Advanced |
| OS | Gaia |
| Platform | 110 |

## Symptoms

- * Upgrade of 1100 appliance from R75.20 to R77.20, fails for the second phase of "Installing new Image":   

  ![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk111332/Software Upgrade Wizard1607110835.png "TITLE")  

* The `messages` file shows:

  ```
  
  DATE TIME Hostname user.info CHECKPOINT: [System Operations] Starting Image upgrade process...
  DATE TIME Hostname user.info CHECKPOINT: [System Operations] Upgrading the appliance software version
  DATE TIME Hostname user.info firmTool: Bad Firmware Magic Number
  DATE TIME Hostname user.err CHECKPOINT: [System Operations] Failed to upgrade the appliance software version
  DATE TIME Hostname daemon.err ntpdate[15464]: no server suitable for synchronization found
  DATE TIME Hostname user.info CHECKPOINT: Canceling software upgrade process
  ```

  <br />

* The downloaded "upgrade_image" logs shows the below errors:

  ```
  
  <Upgrade_timestamp_xxx>: Current image version is
  <Upgrade_timestamp_xxx>: Build number is
  <Upgrade_timestamp_xxx>: Invalid image file
  ```

  <br />

## Cause

The current installed OS image is invalid.

## Solution

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

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