> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues.md).

# Connection Issues

Resolve Command Centre client, server, DCOM, and network connection failures.

Use the exact error message when available. For intermittent failures, collect logs before changing configuration.

{% hint style="info" %}
Check the server name, network path, and recent configuration changes first.
{% endhint %}

## Server connection errors

* [Interface not registered](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-e-2.md)
* [Method of object failed](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-e-3.md)
* [ActiveX Component can't create object](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-error.md)

## Client sign-in issues

* [Unable to log in through IPv6](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-u-2.md)
* [Unable to log in to Configuration Client](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-u-3.md)
* [Configuration Client works through Command Centre Client](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-unabl.md)

## Network and workstation issues

* [OPC connections and DCOM changes](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-opc-c.md)
* [Workstations across a large geographic area](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-works.md)

## Printing and database tools

* [Printing with Windows user accounts](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-p-2.md)
* [Macros or scheduled printing fails](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-print.md)
* [SQL Server Profiler](/knowledge-hub/products/cc-software/troubleshoot/command-centre-connection-issues/command-centre-connection-issues-sql-s.md)


---

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