The new Blenders (2.6) always have this trouble. I can never pack my .blend, Blender says that is can’t find the source of all of my files I brought in (images and sounds). 
And now that I tried doing that, all of my stuff is gone out of the .blend file. >:(
Did you move the files into a different folder or something before packing? If so, that
might be why it’s not packing…
@cam.dudes Where do the paths for your resources point?
Pickle, Everything is exatly where it was when I put it in.
SolarLune, I have a main folder, in it is the .blends and 2 more folders(one is textures and the other is sounds). I replaced all the images and loaded the sounds back. I don’t know what will happen now, but I don’t want to risk it.
I meant what paths are listed in the blend file (i.e. where does it expect to find “player.png”, if you have one in your project).
Exactly where the files are. . . Is that the answer? o.O
Ah, yes, that’s the answer. So the paths are correct, right?
I think I’ve had this bug before, too, but I’m not sure. You tried packing your blend file and it gave you an error? Could it find any of the resources, or did it throw an error for finding them all?
this happend to me to and i couldnt figure it out so what i did was unpack it all then instead of packing it again i just exported the game to a file on my desktop then took and copied all the rescorces into that file manualy and it worked great. im not sure but i think it might give you a bigger file size.
It couldn’t find any files at all.When I tried to export the game as exe it said the same thing.
i meant the files that you had well making the game like textures, sounds and things where ever it is that you keep thows copy them and put them in the same file as the exported runtime.
Okay, it’s kind of getting hard to understand what the problem is.
You try to pack your resources (images and sounds) into your blend file, but Blender says it can’t find them. The paths are correct, right? Could you post a screenshot of an image path and what the error message says, both what’s in the console and the pop-up that Blender probably opens?
Check the path to one of your resources very carefully. My guess is that it just looks right, but is really very wrong. I’ve had this happen before. I look at it, and the visible text in the field says something like “/assets/textures/beautiful_flower.png” and I think everything is just rosy, but when I click it and edit the text, I see it really says something like “/home/your_user/projects/wonderful_blender_game/home/your_user/projects/wonderful_blender_game/home/your_user/projects/wonderful_blender_game/assets/textures/beautiful_flower.png”
If this is happening to you, there is help.
two things:
1 - When your external data disappears from your game (textures disappear, sounds stop working), use the “File >> External Data >> Find Missing” something or other thing. It will let you tell Blender where your missing files are. Hold Shift while selecting files so that you can select a bunch of them at once.
2 - I am going to take a wild guess and stand a good chance of being right. You are using relative paths and play-testing your project with the “Launch Standalone Player” from the Render buttons. Stop doing that. It messes up your relative paths (I have tested this in Blender 2.62, haven’t checked 2.63 yet). If you aren’t doing that, then something else you are doing is messing up your paths. Pay attention to what you are doing when the paths get messed up, then stop doing that thing, whatever it is.