iPhone: Failed to launch simulated application: Unknown error

Question

This is a new iPhone project, only 1 target (different from this question)

On build we get:

Failed to launch simulated application: Unknown error.


        

Answer 1

I sometimes see this problem and it is fixed by rebooting the maching. I suspect the internal state of the simulator gets screwed. Doesn't sound like your problem though.

I agree with MiRAGe; if this persists, start a new project and import your source.

Answer 2

I had the same problem because I had changed the BundleName and some other values but not changed the PRODUCT_NAME. I had problems finding where PRODUCT_NAME is defined: Get Info on the target, Build-tab and it is down the list somewhere.

I changed PRODUCT_NAME to match the bundle name, restarted Xcode and it worked.

Fred

Answer 3

Had same problem. None of the answers above worked for me. Then i remember i had just added the icon to the Resources folder before the problem started. Moved icon to Other Sources folder and it worked. Weird!

Answer 4

I got this problem when I added the .plist to my target (Info.plist -> Get Info -> Targets -> Target Memberships). It went away when I unchecked it again.

I see that that's separate from the Targets -> -> Get Info -> Build -> Packaging -> "Info.plist file" -> my.plist that trips mentioned, but I still don't really understand what's going on, and definitely don't understand why we get such an unhelpful error message.

Answer 5

This happened to me when I changed my version number from 1.0 to 0.1. When I changed it back it started working again.

Answer 6

Thanks ...Did have the same problem or worse. My app wasn't loading in the simulator, alternatively sometimes the build failed. Now realized it's pretty logical.

When you create a new project and info.plist get associated with the project. Each time you add a modify/add the target another plist is generated with the new name.

But the original association with the info.plist is still around and there's a conflict. So remove that association from the current target or better still remove from project and trash the info.plist. Just make sure in the target settings(do getInfo) the correct info.plist is mentioned.

Note the name for product/target should not have spaces. If you really want it change the bundle display name.

Now the only reason why xcode should be closed is to ensure the project file has registered all changes.