Download Failures Due To Invalid File Format
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Download Failures Due To Invalid File Format


Article ID: 286752


Updated On:


Carbon Black App Control (formerly Cb Protection)


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


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


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


  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:
  3. Re-attempt the Agent upgrades.

Additional Information

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