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Patch Download Checksum Failed

Last Updated On: 27 Sep 2026|
3 minutes read |

Problem

Patch download fails with a Checksum Mismatch error.

Cause

A Checksum Failed or Checksum Mismatch error can occur when the download is incomplete or unsuccessful.

Resolution

For On-Premises Setup

Verify whether the affected patch can be downloaded manually in a browser on the server machine.

  1. Search for the Patch ID under Supported Patches or Applicable Patches.
    Patch list showing the Patch ID
  2. Click the Patch ID.
    Patch details showing the patch name
  3. Click the patch name to start the download.
    Patch name download link
  • If the download fails, allowlist the URL's domain in the proxy or firewall and redeploy the patch.
  • If the download succeeds, share the Server, Distribution Server, and Agent logs with Patch Manager Plus support.

For Cloud Setup

Attempt the same patch download on the Distribution Server machine when the agent is under a Distribution Server, or on the Agent machine when it is not.

  1. Search for the Patch ID under Supported Patches or Applicable Patches.
  2. Click the Patch ID.
    Patch details for a cloud setup
  3. Right-click the patch name and select Copy.
    Copying the patch download URL
  4. Paste the URL into a browser on the affected Agent or Distribution Server machine.
  • If the download fails, allowlist the URL's domain in the proxy or firewall and redeploy the patch.
  • If the download succeeds, share the Distribution Server and Agent logs with Patch Manager Plus support.

For the complete proxy, firewall, antivirus, and re-download checklist, refer to Patch download failures.

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