This has happened in the past, and I cant remember how I fixed it.

I downloaded the mdk and unzipped it.

I ran gradlew setupdecompworkspace --refresh-dependencies

I ran gradlew eclipse

I opened eclipse

and when I try to open the project it says that the .project file isn't there, but it is there!

What did I do wrong

Have you checked your workspace file path?  You can change that in Switch workspace make sure it goes to the eclipse folder or the folder where your project is located

it is in the unzipped stuff/eclipse folder

 

it is in the unzipped stuff/eclipse folder

 

Just because that's where Eclipse is doesn't mean that's where it's looking for the project file.

 

Its like saying, "Word can't open my doc file, but it's right there next to word.exe, but I run Word and nothing! Blank!"

I meant that the workspace Is in unzippedfolder/eclipse

And did you tell Eclipse to use that workspace?

yes

Move your workspace folder to your C: drive. That worked for me

the workspace path is C:\MinecraftMod\eclipse

and that didn't work?

 

Try creating a new folder and unzip the file there, and write gradlew setupDecompWorkspace eclipse --refresh-dependencies

 

And also, make sure you have Java 7+ JDK

I tried a folder that was in my user folder instead of the C drive and it works fine now. Not sure what was going on there.

Great!