Error: "Unrecognized command - Error on line nnn: UsesEventHandlers"

  • 7021537
  • 22-Sep-2005
  • 02-Mar-2018


Verastream Host Integrator version 7.0 or higher


You may receive the error "Unrecognized command - Error on line [nnnn]: UsesEventHandlers" in either of the following instances:

  • When deploying a Verastream model to a remote Session Server using the activatemodel command.
  • When opening a model in the Design Tool.

You may also see the error message ID 2584 in the logs, or when you click the Help button in Design Tool.


To resolve the problem, check the version of the Development Kit used to create the model, then upgrade your Server or Development Kit to this version (or higher) by installing the appropriate Verastream product release, service pack level, and/or patch. For more information about how to determine your Development Kit or Server version, please see KB 7021353.


This error is displayed when you attempt to deploy or open a model that was saved with a newer version of Verastream Design Tool.

Additional Information

Legacy KB ID

This article was originally published as Attachmate Technical Note 10050.