> Source: [sk141872](https://support.checkpoint.com/results/sk/sk141872)

# sk141872 - Usage of Dynamic Objects with reserved prefix name

| Property | Value |
|----------|-------|
| Solution ID | sk141872 |
| Date Created | 2018-12-20 |
| Last Modified | 2019-05-12 |
| Technical Level | General |
| Products | Security Gateway, Security Management Server |
| Versions | R82.10, R82, R81.20, R82.20 |

## Symptoms

- "`Policy installation failed on gateway. Dynamic Object <object name> used in policy has reserved prefix (see sk141872)`." message on policy installation failure.

## Cause

Access or Threat Prevention policies contain one or more Dynamic objects with a name that starts with one of the following reserved prefixes:

* CP_MS_
* CP_AWS_
* CP_Azure_
* CP_GEO_

Those prefixes are reserved by Check Point for internal usage of Updatable Objects

## Solution

To resolve the problem, rename all Dynamic objects which names starting with one of the reserved prefixes and then install the Security policy.

**Note**:

1. If you created those Dynamic objects for Online Services solution, replace them with Updatable objects (see [sk131852](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk131852))
2. Dynamic objects with reserved prefix can be used in HTTPS Inspection policy only.

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