Error message: This application was built using a trial version of Syncfusion Essential Studio.

Question

Hi there,I have a community licence - I've also upgraded to Syncfusion Winforms version 19.1.0.54, but I keep getting the error -Error message: This application was built using a trial version of Syncfusion Essential Studio.This only happens after building the code into an installer and installing it on my machine, it's somehow not happening when running the code in Visual Studio 2019. I've already generated and added the licence key details correctly in the code before Application.Run()Is there something missing? Please let me know.Thanks

Manikandaprabu Thiagarajan · Accepted Answer

Hi George, 

Thanks for contacting Syncfusion support. 

Ensure that Syncfusion.Licensing.dll is referred in your project and the proper license key is registered in your application.  

Also, you should set “CopyLocal” to True to Syncfusion.Licensing.dll along with all other Syncfusion assemblies and ensure that the Syncfusion.Licensing.dll assembly also packed and deployed in your installer along with other Syncfusion dependencies. 

Our license keys are version and platform-specific. Please ensure that all the referenced Syncfusion assemblies\NuGet packages are on the same version as license key’s version. 
  
Find below the details to know about generating license key, 
 
https://help.syncfusion.com/common/essential-studio/licensing/license-key#how-to-generate-syncfusion-license-key  
 
Find below the details to know about registering license key, 
 
https://help.syncfusion.com/common/essential-studio/licensing/license-key#how-to-register-the-syncfusion-license-key 
 
Find below the knowledge base article to know about which version license key should use in application,https://www.syncfusion.com/kb/8951/which-version-syncfusion-license-key-should-i-use-in-my-application  

If the reported issue is still not resolved,  please share us the following details to check issue from our side,  


List of Syncfusion NuGet packages\assemblies used and its version,


TargetFrameWork and Platform of your application,
 

Screenshot of the issue


License key registered in your application


Please let us know if any other queries. 

Regards, 
Manikandaprabu.T

George · Answer

Thank you for your response. I've tried all the other options you recommended, but I was still having the same problem. Here's a rough screenshot of the problem:

WORKAROUND

I've just noticed though that the [application].exe XML file also has to be included in the installer.

After I included it in the installer as a file, it was added to the Program Files (x86) directory after installation - the problem no longer occurs. This [application].exe XML file contains some basic Syncfusion configuration settings as shown below:

I didn't know this could affect Syncfusion licensing but thanks for all your help, all sorted for now.

Kalap Johnson Peter Paulraj · Answer

Hi George, 

Thanks for the update. 

We are glad that you’ve resolved the problem. Let us know if you need any further assistance on this. 

Regards, Kalap Johnson Peter P.