Visual Studio 2015 Database Project directory contains a file with extension jfm
<p>Assuming we have a database project called <code>MyDatabase</code> then a file called <code>MyDatabase.jfm</code> appears in the root of the project directory.</p>

<ul>
<li>It is exclusively locked while the project is open in Visual Studio</li>
<li>It is a binary file</li>
<li>It has only started appearing recently (past couple of days)</li>
</ul>

<p>I have done a Google search, which has not offered any insight. There are some references to some old software, but most of the results are spam/trojanware. I have also looked in SO, but that has not produced any results either.</p>

<p><strong>Does anyone know what it is and why it's there?</strong></p>

<p>The plan is to add it to the <a href="https://github.com/github/gitignore">gitignore file for Visual Studio</a>, but I need to know what it is first to submit the PR...</p>

<p><strong>UPDATE</strong></p>

<p>This is now breaking the Team Explorer Changes view. There are no changes being shown with the following from the Output window:</p>

<p><a href="https://i.stack.imgur.com/wUWHC.png"><img src="https://i.stack.imgur.com/wUWHC.png" alt="Screenshot of the error from the output tab"></a></p>

<p>As such I will be adding the file to the .gitignore file and <a href="https://github.com/github/gitignore/pull/2028">submitting the PR</a>. It would be good to eventually learn what this file is and where it came from...</p>