Infopath 2013 Preview with Code Behind Fails on Sharepoint 2016

Nevine Rizkalla 1 Reputation point

I have infopath 2013 installed on a server that host SHarepoint 2016. Whenever i create a blank form and attach blank code to it (just the default solution), the preview of the form from inopath client fails giving the following error:
"InfoPath cannot open the selected form because of an error in the form's code.
Object reference not set to an instance of an object."

Once I remove the code, the form preview works normally! I need to be able to preview forms with code behind prior to publishing them to sharepoint. Any clues?

SharePoint Development
SharePoint Development
SharePoint: A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.Development: The process of researching, productizing, and refining new or existing technologies.
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  1. Yi Lu_MSFT 17,466 Reputation points

    Hi @Nevine Rizkalla
    It seems that this error is caused because you are trying to access a property of an object that is null. Have you tried another code? Will it also cause this error?

    Here are two articles for you to refer according to the error message:

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