Business Portal Terminal Services Error: null-CWTSSession.openCannes:’oWTS’ is null or not an object

After installing the business portal and configuring the terminal services for Dynamics GP, you might get the following error upon trying to open GP form:

“Null-CWTSSession.openCannes: ‘oWTS’ is null or not an object”

Through the business portal installation steps, you will need to adjust some settings on the internet explorer options as mentioned in the installation guide, below are the required steps, complete the steps and the error will no longer exist:

1. Start Internet Explorer and open the Internet Options window.
Tools > Internet Options

2. Click the General tab. Under browsing history, click Settings.

3. The Temporary Internet Files and History Settings window is displayed. Be
sure the Check for newer versions of stored pages option is not set to Never.

4. Click OK to close the settings window.

5. Click the Security tab, highlight Trusted Sites, and click Sites to open
the Trusted Sites window.
If Business Portal doesn’t use Secure Sockets Layer, you must clear the Require Server verification (https) for all sites in this zone check box. If you can’t clear the check box, you must change the security settings for the Local Intranet zone instead of adding Business Portal to your Trusted Sites list.

6. In Add this Web site to the zone, enter the Business Portal URL and click Add.

7. Click OK to close the Trusted Sites window.

8. In the Internet Options window, be sure Trusted Sites is still selected and click Custom Level to open the Security Settings window.

9. In the ActiveX controls and plug-ins section, select Enable for the following
• Download signed ActiveX controls
• Initialize and script ActiveX controls not marked as safe for scripting
• Run ActiveX controls and plug-ins

Changing these options will allow ActiveX controls to run automatically on all
web sites in your Trusted Sites zone. This zone contains sites that you
believe you can download or run files from without worrying about damage to your
computer or data. The security level for trusted sites is typically lower than the
general Internet or Intranet security level.

10. Click OK. An alert message will be displayed, asking if you’re sure that you want to change the security settings for the zone. Click Yes.

11. Click OK to close the Internet Options window.

Finally if you followed the above steps and still getting the problem, change the compatibility level in the internet explorer and it should no longer exist.


Mohammad R. Daoud
Software Development Manager
+962 – 79 – 999 65 85
Great Package For Business Solutions

About Mohammad R. Daoud
Mohammad R. Daoud has been working as a Microsoft Dynamics GP consultant since 2004. His career path started with version 7.5; he studied every single tip of the application technicalities and did allot of successful implementations that includes functional consultations, analysis, and custom development projects. He holds a graduate degree in Computer Science and currently he is pursuing MBA degree in Accounting. In January 2007 he was nominated to the Microsoft Most Valuable Professional (MVP) certificate and was certified in April 2008 due to his online contributions in the Dynamics Community (Dynamics GP Newsgroups, Forums, User Groups and his blog: Worth to mention that he was also listed as one of the Microsoft Dynamics Top 100 Most Influential People in 2009 by DynamicsWorld. And more... • Demonstrated Passion for MS Products through participating in beta testing for some product versions, an effective member of Microsoft Connect. • Talented in securing strong high quality relationships with premier customers, partners and sales teams passionately and profitably. • Dedicated to meeting the expectations and requirements of internal and/or external customers • Problem Solver – Uses systematic approach to uncover true problem(s) and practical solution and can marshal resources to solve problem! • Proven record of effective account management, including Account Planning, Opportunity Management, and Business Management Excellence and working as part of a larger virtual team • Successful in delivering high quality technical engagements in the enterprise Dynamics GP implementations area according to customer requirements. • Dedicated, Committed, Self Motivated, Creative and highly focused with excellent communication, Negotiation, presentation, Active Listening and Objection Handling skills. • Experienced in Profitable researches and studies including white papers and technical presentations.

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