ERR_PACKET_RELEASE

Firmware use only

Allen-Bradley · MicroLogix 1400 Programmable Controllers

What does ERR_PACKET_RELEASE mean?

This error is for firmware internal use only, indicating a failure to release a packet. This suggests an internal memory management issue where packet buffers are not being properly deallocated, potentially leading to memory leaks or resource exhaustion.

Common Causes

  • Memory leak within the Modbus TCP firmware module.
  • Corrupted memory pointers preventing proper deallocation of packet buffers.
  • Internal operating system error related to memory management.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Restart the controller to clear internal memory states and force release of packet resources.

  2. 2

    Consider updating controller firmware if the issue persists, as it may indicate a known bug.

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Verified technical data. Last updated: March 2026

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Source: Allen-Bradley MicroLogix 1400 Programmable Controllers