Cannot Install into iPhone Simulator

I've got an Xcode project that I've been working on over the past few weeks.

I just made some changes to an embedded framework that I'm working on (recompiled, to be specific) now,开发者_开发技巧 however, I am unable to launch the application in the simulator.

The app hangs on "Attaching to [app name]," if I have a debugger on. If I don't have a debugger on, Xcode just says the app has finished running.

There is no icon installed on the device.

Here's what I've done so far:

• Restarted
• Reset simulator
• Clean and build
• Deleted derrived data

I cannot install onto a device either, but then I get an error:

Error launching remote program: No such file or directory (/Users/peter/Library/Developer/Xcode/DerivedData/x-gtwuuwmavjonyrcxjmpcletdpyjw/Build/Products/Debug-iphoneos/x.app/x).

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Oddly enough, what worked was installing another app in the sim (just launched another project and ran it) and then launching the other app in the sim.

I'm not sure what the issue was, but I tried it on two computers and it was hanging on each, so it was related to the project rather than the simulator. There's an issue to think about...