Download Failures Due To Invalid File Format

Products

• Carbon Black App Control (formerly Cb Protection)

Issue/Introduction

Upgrading Agents through the Console results in an error similar to either:

Failed to download upgrade package: https://ServerAddress/hostpkg/pkg.php?pkg=/ParityHostAgent.msi. Invalid file format.

or
Failed to download upgrade package: https://ServerAddress/hostpkg/pkg.php?pkg=/ParityHostAgent_sha1.msi. Invalid file format

Environment

• App Control Agent: All Supported Versions
• App Control Server: All Supported Versions
• Microsoft Windows: All Supported Versions

Cause

The specified MSI file does not exist at the URL specified.

Resolution

1. Verify the Resource Download Location specified is correct.
2. Verify the files exist in the Resource Download Location (by default this is in \Parity Server\hostpkg\ on the application server). If missing:
   • Install the required Host Package Certificates on the application server.
   • Re-install the relevant Host Package Installer locally on the application server.
3. Re-attempt the Agent upgrades.

Additional Information

Agent versions prior to 8.1.8 encountered this error when in a Disabled Enforcement.