Can't open my project - "Try rebuilding from source manually"

So, I was interested in adding some C++ to my project and downloaded Visual Studio 2015, where I tried to build the project, and since then I’ve been having some trouble. I’d be happy to forget about the code and just stick to blueprints, but now I can’t even open my project anymore.

When I try I get this message:

“The following modules are missing or built with a different engine version:
UE4Editor-(my project).dll
Would you like to rebuild them now?”

And when I select “Yes” I get this:

“(my project) could not be compiled. Try rebuilding from source manually.”

I don’t know what this means, but I guessed it meant I needed to rebuild the project in Visual Studio. Of course, that only earns me an error message, which I’ve attached in case it’s useful.

I’m hopeful I’m just dueling with forces beyond my ken and all that, but I’m kind of screwed right now. Any help is appreciated.

EDIT: The problem persists, but I’m not as screwed as I thought I was. I made a new project and copied my content folder into it, and everything seems to have made it over intact. There are a lot of small discrepancies, but they’re fixable. If anyone can help me figure out what went wrong with my original project, I would be grateful, but in the meantime I’m not in serious trouble.

Hi Cinebeast,

Looking at the log you attached, it looks like you don’t have the rights to run the command. In the past I’ve found this to be because you either don’t have administrator rights or the project is read-only.

Try selecting the folder in Windows and right-click > Properties > Uncheck ‘Read-Only’ and apply it to all sub-folders. Then try to open and have the project rebuild.

I hope this helps.

Tim

Thanks for the speedy reply. Unfortunately, the same error occurs. I noticed that as soon as I exit the properties menu and open it back up, the Read-Only box is checked again. Maybe that’s causing a problem.

Did you get this to work ?
I’m having the same issue and can’t for the love of me figure it out

Old post, but just wanted to point out, the message “Please verify that you have sufficient rights to run this command” is, in fact, not necessarily indicative of a lack of permissions. I have received that message with VS 2015 every time some artifact (e.g. a library) could not be generated for some reason. In this case, it simply seems that “Undertale_FanGame.Target.cs” contained a duplicate definition of the symbol “Undertale_FanGameTarget” at line 6, col. 14.

me too :confused: did u have a solution ?

Though this is old I found that doing what’s listed in the link works.

  1. Create a new blank project, save the project, and then close the Unreal Editor.

  2. Navigate to your project files (mine were under C:\Users[Username]\Documents\Unreal Projects) and find your old (insert version) project. In the root folder of that project, select your “Content” folder and copy it.

  3. Go back to the files of your Unreal project and find the new project folder you just created in (newer version). In the root folder of your new project, paste the “Content” folder you copied earlier from your old project and merge those folders together.

  4. Now open up the new project you just created in the Unreal Editor and you should be presented with a working version of your original (old version) project.

I’m using the version 4.18.1 and using a C++ project, and this worked for me, so it might help anyone who may also have this problem in the future.

Though this is old I found that doing what’s listed in the link works.

  1. Create a new blank project, save the project, and then close the Unreal Editor.

  2. Navigate to your project files (mine were under C:\Users[Username]\Documents\Unreal Projects) and find your old (insert version) project. In the root folder of that project, select your “Content” folder and copy it.

  3. Go back to the files of your Unreal project and find the new project folder you just created in (newer version). In the root folder of your new project, paste the “Content” folder you copied earlier from your old project and merge those folders together.

  4. Now open up the new project you just created in the Unreal Editor and you should be presented with a working version of your original (old version) project.

I’m using the version 4.18.1 and using a C++ project, and this worked for me, so it might help anyone who may also have this problem in the future.