> ## Documentation Index
> Fetch the complete documentation index at: https://devzone.nayax.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Log Analysis

This workflow covers turning on SDK logging, running a log through the comparator tool, and reading what the results mean. Use it before you send a certification test result to your Nayax integrator, or whenever you are debugging a Marshall integration.

## What the Log Trace Comparator is

The Marshall Log Trace Comparator is an automated log-comparison tool for the Marshall SDK and firmware protocol. It reads a log file, or an Excel certification workbook, and runs it through the same nine checkpoints Nayax uses when reviewing your certification tests. For every checkpoint that fails or needs a look, it shows a suggested fix and a link to the page that explains it.

The checkpoints come from real passing and failing logs, collected across all three SDK languages: C, C#, and Java. Everything runs in your browser, so your log files never leave your machine.

## What it does not do

The tool is a fast first pass. It does not replace your own judgment, and it does not decide whether your integration passes certification. Your Nayax integrator does that.

A warning is also not the same as a bug. Some tests are designed to produce one: a 24-hour idle test, a session timeout, and a stress test all report timing failures that are the test working as intended. Read the test name before you act on a result.

## Next steps

<CardGroup cols={3}>
  <Card icon="file-lines" title="SDK Log Generation" href="/docs/integrate-pos-device/marshall/log-analysis/log-generation">
    Turn on SDK logging so you have a log file to run through the tool.
  </Card>

  <Card icon="magnifying-glass-chart" title="Log Trace Comparator" href="/docs/integrate-pos-device/marshall/log-analysis/log-trace-comparator">
    Drop in a log file or certification workbook for an instant pass/fail verdict against known-good reference traces.
  </Card>

  <Card icon="book-open" title="Checkpoints & Scenario Tags" href="/docs/integrate-pos-device/marshall/log-analysis/log-trace-comparator-guide">
    The full checkpoint reference, scenario tags, and how to tell a real issue from a false positive.
  </Card>
</CardGroup>


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