Title: Fix WHMCS Cron Memory Error in cPanel
PrimaryCategory: cPanel &amp; WHM Hosting
Type: Procedural
Tags: WHMCS, cron, memory_error, cPanel, scheduled_task
Source UI Terms: Cron Jobs, Edit, Utilities, WHMCS Update, Check for Updates, Advanced
Source Reference: Fix WHMCS Cron Memory Error in cPanel

Prerequisites:
- Access to cPanel with permission to edit cron jobs.
- Knowledge of the WHMCS cron job path and schedule.

Steps:
1) Login to your cPanel account.
2) Navigate to the Advanced section and select Cron Jobs.
3) Locate the WHMCS cron job, typically running the script at `/home/username/whmcsdata/crons/cron.php` every 15 minutes.
4) Click on Edit next to the WHMCS cron job.
5) Modify the cron command to the following to reduce memory usage by skipping the WHMCS update check:
```
php -q /home/username/whmcsdata/crons/cron.php -vvv skip --CheckForWhmcsUpdate
```
6) Save the changes to update the cron job.

Warnings:
- Note: The maximum memory limit on shared servers is typically 256 MB per account, which can cause the original cron job to fail.
- You can manually check for WHMCS updates via the WHMCS admin panel: Utilities &gt; WHMCS Update &gt; Check for Updates.

Summary:
To fix WHMCS cron memory errors in cPanel, modify the cron job command to skip the WHMCS update check, which lowers the memory usage and prevents failure due to server memory limits.

Evaluation Pairs:
Q: What error indicates a WHMCS cron job failure due to memory limits?  
A: &quot;WHMCS cron error: mmap() failed: [12] Cannot allocate memory.&quot;

Q: How often is the WHMCS cron job typically scheduled to run?  
A: Every 15 minutes.

Q: How can I reduce the memory footprint of the WHMCS cron job?  
A: Modify the cron command to include &quot;-vvv skip --CheckForWhmcsUpdate&quot; to skip the update check.

When a WHMCS scheduled task fails due to server memory limits in your cPanel environment. This article explains how to adjust settings to resolve memory issues during cron jobs.  You may receive the below email or a similar error within WHMCS regarding the failure of the daily WHMCS cron job.  
<h2>Error</h2>
<pre style="margin-left: 40px;">WHMCS cron error: mmap() failed: [12] Cannot allocate memory.</pre>
 
<h2>Reason for Error</h2>
<ol><li>The daily WHMCs cron job under /home/username/whmcsdata/crons/cron.php is scheduled to run every 15 minutes.</li><li>We have a maximum memory_limit of 256 MB on our shared servers per account.</li><li>The WHMCS cron performs a number of activities and the memory footprint of the cron can be lowered by skipping the WHMCS update check.</li></ol>
<h2> To fix the Error</h2>
You may modify the command to the below mentioned command:
<pre class="ckeditor_codeblock">php -q /home/username/whmcsdata/crons/cron.php -vvv skip --CheckForWhmcsUpdate</pre>
 You can modify the Command by following these steps
<ol><li>Login to your cPanel</li><li>Under Advanced &gt; Cron Jobs</li><li>Navigate to the above Cron Job and click on Edit.</li></ol>
 Additional Resources  You may refer the links below:
<ol><li><a href="https://docs.whmcs.com/Crons" target="_blank">WHMCS Crons</a></li><li><a href="https://help.whmcs.com/m/automation/l/678187-configuring-when-your-daily-cron-runs" target="_blank">Configuring Daily Crons</a></li></ol>
 NOTE You can check for WHMCS updates manually from Utilities&gt;WHMCS Update and clicking the Check for Updates button. For any further queries, you can contact our 24/7 support team through the desired channel.

When a WHMCS scheduled task fails due to server memory limits in your cPanel environment. This article explains how to adjust settings to resolve memory issues during cron jobs.