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license key validation issue

I have an Essential Studio Enterprise Edition Binary with TestStudio license.  Everything is fine until I put tabs onto my MVC form and start getting the error message "This application was built using a trial version of Syncfusion Essential Studio. To remove the license validation message permanently, a valid license key must be included. Claim your free account. "

To test whether this was the cause I removed the Tabs and the error goes away. Are these not part of the community license?

3 Replies

SI Silambarasan I Syncfusion Team February 28, 2023 01:48 PM UTC

Hi Phillip,

Please ensure that you have registered the license key in Application_Start method.

If registered, could you please confirm whether you are using Syncfusion MVC (Html/Tag helpers) components or JavaScript components?

Silambarasan Ilango

PH Phillip replied to Silambarasan I February 28, 2023 09:30 PM UTC

Hi Silambarasan,

This is .Net core 6 MVC so I have the registration Key registered in the program.cs which is working because I also have a rich text editor on the same page and removing the tabs removes the errors.

I have done some more investigating and after using your Getting Started sample for Tabs HTML Sample I found that when I add the script at the bottom the message is displayed.

    var tabObj = new ej.navigations.Tab({
        heightAdjustMode: "Auto"

Additionally, when I generated the licence key I told it to create it for ALL platforms.



BH BharatRam Harikrishnan Syncfusion Team March 1, 2023 01:28 PM UTC

Hi Phillip,

Based on the details provided, you have rendered the Tab as a JavaScript component in your ASP.NET Core MVC application. So, you also need to register the license in _Layout.cshtml (for JavaScript) as follows,




//Register Syncfusion license




UG reference:



Bharat Ram H

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