Why do I suddenly receive the error message: "Compiler Error Message: The compiler failed with error code XXXXXXXXX"?

Article Number: 310 | Rating: 5/5 from 1 votes | Last Updated: Wed, Sep 24, 2025 at 12:07 AM

You might be wondering the reason your site suddenly throws an error message: "Compiler Error Message: The compiler failed with error code XXXXXXXXX". What is even more confusing is that your site was working perfectly fine and suddenly, it just stops working today. You might probably do just a simple change on your site such as you deploy new files to the server and suddenly, you see this error message.

This happens simply because of the existence of the newest .NET 4.6.1 framework on the server. As Microsoft always releases new product, we have no choice but to follow the latest update made by them. So, you can see this issue simply because you are using an older development tool, such as VS 2010 or VS 2012. It does not mean that you need to upgrade your code to use .NET 4.6.1. You can always use your existing code, but you need to have it compiled with the newest Visual Studio (VS) 2015 tool

To resolve this issue, you just need to download the free Visual Studio 2015 Community Edition from https://www.visualstudio.com/en-us/downloads/download-visual-studio-vs.aspx.

Next, please just follow the steps outlined on http://faq.asphosthelpdesk.com/article.php?id=299