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The issue occurs because the OSCE server has enabled signature checking but the checked file cannot pass.

To resolve the issue, disable the signature checking:

  1. Open the aucfg.ini file located under PCCSRV\Web\Service.
  2. Set the value of the following key to "0".

    check_files_signature=0

  3. Restart the OfficeScan Master Service.

If the issue persists, collect the logs:

  1. Enable the debug log in aucfg.ini using the commands below:

    [debug]
    level=-1

  2. Use the Case Diagnostic Tool (CDT) to activate the debug mode.
  3. Replicate the issue.
  4. Gather the following files and send to Trend Micro Technical Support:
    • CDT logs with all the events including the tmudump.txt1 file
    • timestamp.txt