Unable to build using Xcode 4 - The selected run destination is not valid for this action

So I'm horrib开发者_运维问答ly confused by this error, other threads on Stack Overflow mention I should set the SDK, but I see no option to do this. I'm trying to build:http://wafflesoftware.net/shortcut/

And I get no options, and I can only choose My Mac 64-bit, and I want it in 32-bit. Really beginning to hate Xcode 4.

Here is the screenshot when I try to edit my scheme: http://groovyape.com/scheme.png

Thoughts?

Firstly, I have observed that when Xcode 4 decides my Mac is 64 bit and all my other schemes have vanished, a restart of Xcode fixes that.

If you still have the issue after a restart, go to Manage Schemes... (under the Product Menu) and click on Autocreate Schemes now button. Try to delete the other schemes and see if you can run the project now.

However, if the issue is that you need to set the SDK, that's different:

1. Click on the top-level project icon in the left hand panel
2. In the right hand panel that appears, select Build Settings (near the top).
3. Select "All" option (instead of Combined)
4. Ensure Base SDK is set appropriately, like "OS X 10.7".

FWIW I'm seriously considering reverting to Xcode 3.2.5 at the moment, 4 seems horrendously buggy.

In xCode 4.4.1, use Validate Settings to solve the problem!

I can select either 32bit or 64bit now.

Ran into the same error message ("The selected run destination is not valid for this action") when attempting to use XCode 4 to build/run a tiny Objective-C "Hello, World" project I created in XCode 3.x. Fixed it by choosing to "Manage Schemes..." from the drop-down menu to the right of the Stop button, deleting the one scheme on the list (click checkbox beside the scheme, then click the "-" button at the bottom left), and then clicking "Autocreate Schemes Now".

I also needed to change the "Base SDK" from 10.5 to 10.6, by clicking on 'folder' icon (beneath the Run button), clicking the root/top of the tree view below it, clicking on the blue icon below "PROJECT" in the pane just to the right, and then finally, choosing "Latest Mac OS X (Mac OS X 10.6)" to the right of that.

I had this issue today. I found switching Base SDK from Latest iOS (4.3) to iOS 4.3 fixed everything.

This will happen if XCode believes your mac is a 64-bit machine, when really it's a 32-bit. If this is the case for you, simply click on your project icon from the far-left pane - it's the menu item that displays your project name next to a little blue icon. This should bring up a center pane that says "PROJECT" at the top. Highlight your project name, and the third pane should now show your build settings. The first item is "Architectures" which will allow you to specify if you are building a 32-bit or 64-bit application.

Kind of amazing that none of the answers here solved the issue for me, but I figured it out. Forget restarting Xcode, or using Autocreate Schemes, still only 64-bit will show up as a valid destination in the scheme.

The correct solution is to change the Architecture for your project. Go to Build Settings (in the root node of your project), and change Architecture to 32-bit Intel, it's right above the Base SDK setting. Destination will instantly switch to "My Mac 32-bit". HTH somebody.

It sounds as if you're trying to run (Cmd-R or run button) the framework (which you can't do - it's not an executable, just a library) rather than simply build it (Cmd-B).

I had this issue and maybe it was a coincidence but when I restarted XC4 but this time didn't choose to load my project from the popup window that appears on launch - instead choosing it explicitly from the File menu - the issue didn't occur and the build started ok.

On the 3 or 4 occasions I had this error, I had chosen to load the project from the popup window that appears when XC4 first loads.

As I say, I might have just got lucky, but I certainly didn't make any other changes to the projects to 'fix' the issue.

I found a good practice for moving from Xcode 3.2.X to Xcode 4 is, to remove any references to older SDKs (in the case of Mac OS to remove any Base SDK Ref, etc., for Mac OS <= 10.5, in the case of iOS I think you need to remove everything <= 4.3) PRIOR to upgrading to Xcode 4.

I never experienced any problems for new Projects, created in Xcode 4, only for such that where created with Xcode 3.X or 2.X

Xcode 4.5. I was trying to compile for 10.6. It seemed to be stuck on 64 bit just because it couldn't find the sdk. I didn't get any message about it not finding the sdk.

I first tried to put in the correct path to /Developer-3.2.6/SDKs/MacOSX10.6.sdk but xcode didn't want to find it there. Then I copied that folder into 4.5 next to the other OSX Platform sdk (new location I think just look in the bundle).

And magically my 32 bit came back.

So my conclusion is that the 32/64 bit option is really dependent on whether xcode can verify the sdk that you're trying to use. Being stuck at 64 while trying to compile for 32 gives the error without notifying you that its first issue is that the sdk can't be found.

I fixed this by deleting my xcuserdata in my Project file. Not sure how it got corrupt. But it worked for everyone else in the office, deleting the xcuserdata did the trick. I made sure Xcode was closed while doing so. Just for fun, make sure you delete your DerivedData folder for the app, and do a build clean for superstitious folks.

If this happened after you renamed your app, go to Schemes -> Edit Scheme -> Run <YourApp> -> Info Select the right executable file (YourApp.app)

Another way is to select None as executable and then reselect the YourApp.app from your Debug-iPhoneOS folder.