Software⏱️ 3 min read📅 2026-06-15

How to Fix ERROR 500 Error – localhost is currently unable to handle this request. HTTP ERROR 500 wamp server using OSPOS

Fix HTTP ERROR 500 issue in OSPOS with WAMP Server using PHP GD library.

Quick Answer: Install PHP GD library to resolve the error.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

The error 'localhost is currently unable to handle this request. HTTP ERROR 500' occurs when the server encounters an internal server error, which can be frustrating for users trying to access reports in OSPOS.

This issue affects users who are using WAMP Server with OSPOS version 3.0.2 and attempting to access detailed reports.

💡 Why You Are Getting This Error

  • The primary reason for this error is a PHP Fatal error caused by a call to a member function result_array() on boolean in the Specific_customer.php file of the reports model.
  • An alternative cause could be an issue with the WAMP Server configuration or the PHP version being used, which may require additional troubleshooting steps.

🔧 Proven Troubleshooting Steps

Updating PHP Version and Checking GD Library

  1. Step 1: Update the PHP version to a compatible one (e.g., PHP 7.0.10) by reinstalling or updating the WAMP Server.
  2. Step 2: Check if the GD library is installed and enabled in the PHP configuration. If not, enable it by adding the following line to the php.ini file: gd.enabled = On
  3. Step 3: Restart the WAMP Server after making these changes to ensure they take effect.

Checking Specific_customer.php File for Errors

  1. Step 1: Open the Specific_customer.php file in a text editor and check for any errors or deprecated functions.
  2. Step 2: Update the code to use the correct function (e.g., result_array() instead of getData()) if necessary.
  3. Step 3: Save the changes and restart the WAMP Server to apply them.

💡 Conclusion

To resolve this issue, update the PHP version and check the GD library. If these steps do not work, inspect the Specific_customer.php file for errors and make the necessary corrections.

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