> Source: [sk184233](https://support.checkpoint.com/results/sk/sk184233)

# sk184233 - Maestro Orchestrator fails to add a new Security Appliance to a Security Group when Fastforward is enabled

| Property | Value |
|----------|-------|
| Solution ID | sk184233 |
| Date Created | 2025-11-03 |
| Last Modified | 2026-04-06 |
| Technical Level | General |
| Products | Scalable Platforms |
| Versions | R82.10, R82 |
| OS | Gaia |
| Platform | Maestro Orchestrator |

## Symptoms

- * Gaia Portal on the Maestro Orchestrator shows "`Failed to apply topology`" after adding a new Security Appliance to a Security Group and clicking "**Apply**" (in the "Orchestrator Management" section, click the "Security Groups" page).

* Adding a new Security Appliance to a Security Group in Gaia Clish on the Maestro Orchestrator fails with:

  ```
  set maestro security-group apply-new-config
  
  Traceback (most recent call last):
    File "/usr/lib/smo/libssm_sg.py", line XXX, in calc_summary_on_local
      rc = running_sgdb.sanity()
    File "/usr/lib/smo/libssm_sg.py", line XXX, in sanity
      self._sanity_fastforward()
    File "/usr/lib/smo/libssm_sg.py", line XXX, in _sanity_fastforward
      used_interfaces = output[0].split(',')
                        ^^^^^^^^^^^^^^^^^^
  TypeError: a bytes-like object is required, not 'str'
  ```

* These errors appear the `/var/log/ssm_sg.log.dbg` file on the Maestro Orchestrator:

  `
  <DATE TIME>,XXX _sanity_fastforward INFO Sanity - Checking fastforward used interfaces`  
  `
  <DATE TIME>,XXX is_fastforward_enabled INFO Executing: tor_util fastforward feature state, res = 0, output = b'1'`  
  `
  <DATE TIME>,XXX _sanity_fastforward INFO Executing: tor_util fastforward show _used_interfaces 1, res = 0`  
  `
  <DATE TIME>,XXX calc_summary_on_local ERROR Failed to verify changes. Exception: a bytes-like object is required, not 'str' with traceback: Traceback (most recent call last):`  
  `
  File "/usr/lib/smo/libssm_sg.py", line XXX, in calc_summary_on_local`  
  `
  orch_sg_config.sanity()`  
  `
  File "/usr/lib/smo/libssm_sg.py", line XXX, in sanity`  
  `
  self._sanity_fastforward()`  
  `
  File "/usr/lib/smo/libssm_sg.py", line XXX, in _sanity_fastforward`  
  `
  used_interfaces = output[0].split(',')`  
  `
  ^^^^^^^^^^^^^^^^^^^^`  
  `
  TypeError: a bytes-like object is required, not 'str'
  `
* Maestro Fastforward is enabled in the Security Group.

## Solution

This problem was fixed. The fix is included in:

* [Jumbo Hotfix Accumulator for R82.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82.10/Default.htm) starting from Take 6
* [Jumbo Hotfix Accumulator for R82](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82/Default.htm) starting from Take 73

If you choose not to upgrade, Check Point can supply a **Hotfix** . [Contact Check Point Support](https://www.checkpoint.com/support-services/.contact-support/) to get a Hotfix for this issue.  
A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.  
For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

<br />

As an immediate temporary **workaround**:

1. Disable the Fastforward feature in the Security Group.
2. Add the new Security Appliance to the Security Group.
3. Enable the Fastforward feature in the Security Group.

---

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