> Source: [sk168753](https://support.checkpoint.com/results/sk/sk168753)

# sk168753 - "Error has occurred while applying the Firewall settings (error 00351)" appears while applying the Firewall settings on 1500 SMB appliances

| Property | Value |
|----------|-------|
| Solution ID | sk168753 |
| Date Created | 2020-08-29 |
| Last Modified | 2022-07-14 |
| Technical Level | General |
| Products | Spark Firewall (Locally Managed) |
| Versions | R81.10.X |
| Platform | 1500, 1600, 1800 |

## Symptoms

- "`Error has occurred while applying the Firewall settings (error 00351)`" appears when the user tries to manipulate policy.

<br />

## Cause

Threat Prevention exceptions whose source is set to **User** or **User Groups** are not supported.

<br />

## Solution

This problem was fixed. The fix is included in:

* [**R80.20.10 for Small and Medium Business Appliances**](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk167012)

Check Point recommends to always upgrade to [the most recent version](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doShowproductpage&productTab=overview&product=512).

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