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If your document opened successfully, and you see the above dialog box in a subsequent attempt, click the button for "My document opened". This should prevent the popup from appearing in the future.
For now, we enabled document handler globally for all systems on our cloud. If you would like it to be controlled by individual users you can set the following system parameter to False.
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Latest version of Document Handler can be downloaded here - https://app.smartadvocate.com/SA/Distr/SADocHandler.zip