---
title: "Logging"
url: "https://help.maxon.net/c4d/en-us/Content/html/MCPADAPTERPREFS-MCPADAPTERPREFS_GROUP_LOGGING.html"
section_path: "Configuration > Preferences > MCP > Logging"
element_id: "MCPADAPTERPREFS"
group_id: "MCPADAPTERPREFS_GROUP_LOGGING"
description: "The Logging settings determine what record is kept of the requests the server receives, and how much of that record is surfaced while you work. They …"
---

## Logging

The Logging settings determine what record is kept of the requests the server receives, and how much of that record is surfaced while you work. They affect reporting only: neither option changes which requests are accepted, nor what a connected client is permitted to do.

### Log Incoming Calls

Parameter ID: `MCPADAPTERPREFS_ENABLE_LOGGING`

When enabled, each accepted request is written to the log — the operation that was invoked together with the arguments it was given. This is the audit trail. It is what allows a session to be reconstructed after the fact, and it is the first place to look when a client's behaviour needs to be explained.

The record covers the content of a request, not merely its name. Where a client submits Python source for execution, the submitted code is logged in full. Keep this in mind if logs are collected centrally or passed on for support purposes: they can contain file paths, scene data and anything else a client transmits.

Disabling the option reduces the volume that is written, at the cost of leaving accepted requests unrecorded.

### Show Rejected Calls in Console

Parameter ID: `MCPADAPTERPREFS_CONSOLE_REJECTIONS`

A rejected call is a request the server declines rather than answers. Rejections arise for several distinct reasons:

| Reason | Typical situation |
| --- | --- |
| Missing or incorrect authentication token | A request arriving with no token or an unrecognised one — on a reachable port commonly an unsolicited probe rather than a configured client |
| Source address not permitted | A remote client on a host that is absent from **Whitelisted IP**s |
| Origin not permitted | A browser-based client whose origin is absent from **Browser Client Origins** |
| Capability switched off | A request to run Python while the corresponding option in the *Security* settings section is disabled |

When this option is enabled, each rejection is reported in the Cinema 4D *Console* as it occurs. It is disabled by default: a server reachable over a network attracts unsolicited requests, and in normal operation the resulting entries add noise rather than insight.

Enable it while diagnosing a connection that does not behave as expected. A client that cannot connect at all, or that reports a tool as unavailable, will usually produce an entry naming the reason — which is considerably quicker than inferring the cause from the client side alone.