---
title: "14. Logging & Diagnostics"
space: "CAMS Biometric Integration"
url: "https://docs.navari.co.ke/cams-biometric/logging-diagnostics"
updated: "2026-05-27"
---

### 14.0 Built-in Logging

Version 1.0.0 added explicit logging capability to the app. Log entries are written to Frappe's standard logging infrastructure and can be viewed in:

- **Settings > Error Log**: for errors and exceptions
- Server log files at `frappe-bench/logs/`: for detailed trace output



### 14.1 What Gets Logged

- AuthToken validation failures
- Employee not found (biometric ID with no matching employee)
- JSON parsing errors
- Exceptions during Employee Checkin creation
- Successful punch processing (at DEBUG level)



### 14.2 Reading Error Logs

In FrappeHR:

1. Go to **Settings > Error Log** (or search for "Error Log")
2. Filter by **Method** containing `cams_call` to isolate integration errors
3. Each error log entry shows the timestamp, error message, and full traceback