I added a query to a table adapter in the dataset designer. The query I added didn't show up on the designer. I tried to build the project and got the following error message.

Custom tool error: Failed to generate code. Failed to generate code. Object reference not set to an instance of an object.

Then I right clicked on the dataset in the Solution Explorer and selected 'Run Custom Tool'. Doing that gave me a popup with the following message along with the above error message.

The custom tool 'MSDataSetGenerator' failed. Failed to generate code. Object reference not set to an instance of an object.

I also noticed the Designer.cs file is missing.

So what are my options?