> Source: [sk171395](https://support.checkpoint.com/results/sk/sk171395)

# sk171395 - "gen_nat_hitcount_table: uuid_string_to_uints failed" error on policy installation failure

| Property | Value |
|----------|-------|
| Solution ID | sk171395 |
| Date Created | 2021-01-04 |
| Last Modified | 2021-04-28 |
| Technical Level | General |
| Products | Security Management Server |
| Versions | R81 (EOS) |

## Symptoms

- Policy installation fails with the "`gen_nat_hitcount_table: uuid_string_to_uints failed`" error.

## Cause

Some automatic NAT rules might be missing in the SmartConsole, as a result policy installation fails.  

During the install policy process the automatic NAT rules are used only for the NAT Hitcount feature.  
The rules that are missing in the SmartConsole doesn't affect the NAT policy enforcement.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R81](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk170114) starting from Take 11
* [Jumbo Hotfix Accumulator for R80.10](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk116380) starting from Take 290

<br />

If you choose not to upgrade, the following workarounds are available:

**Option 1:**

Disable the Hitcount feature on NAT rules by creating a file named "*skip_nat_hitcount_on_auto_rules.txt* " in *$MDS_FWDIR/conf/* directory.

This can be done by running the following command:

*touch $MDS_FWDIR/conf/skip_nat_hitcount_on_auto_rules.txt*   

**Option 2 (recommended):**   

Force recreation of the missing rules by running a script on all the relevant objects that should created automatic NAT rules.

1. Take a snapshot (important!) before running the script.
2. Download [fixNatAutomaticRules.tgz](https://supportcenter.checkpoint.com/supportcenter/portal?action=portlets.DCFileAction&eventSubmit_doGetdcdetails=&fileid=111848)
3. Move the tgz file to the machine home directory.
4. Extract fixNatAutomaticRules.sh script   
   *# tar -zxvf fixNatAutomaticRules.tgz*
5. Assign the required permissions:  
   *# chmod +x fixNatAutomaticRules.sh*
6. Run the script:*# ./fixNatAutomaticRules.sh*

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