I have now run my Kivy app on an iPhone 5s simulator in Xcode. That gives a slightly different error, but the app DOES run without any real problems. So the question is: How serious are these 'dlopen' errors? Here comes the slightly different error from the simulator: Got dlopen error on Foundation: dlopen(/System/Library/Frameworks/Foundation.framework/Versions/Current/Foundation, 1): no suitable image found. Did find: /System/Library/Frameworks/Foundation.framework/Versions/Current/Foundation: mach-o, but not built for iOS simulator Got fallback dlopen error on Foundation: dlopen(/Groups/System/Library/Frameworks/Foundation.framework/Versions/Current/Foundation, 1): image not found Note that I DON'T get this error: 2021-02-28 23:09:59.023510+0100 geo-esp-training[457:91731] XPC connection interrupted Note: My Mac has 29 'Foundation.framework' folders and a total of 672 '*Foundation.framework' folders... So how am I to know which folder to point to instead of the one where the 'image' is not found?

It's Python. The error occurs in this file write operation statement (line 180): json.dump(self.config_data, config_file) Here is the Traceback: Traceback (most recent call last): File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 252, in module File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 180, in __init__ PermissionError: [Errno 1] Operation not permitted: 'geo-esp-train.cfg' 2021-02-28 23:09:59.085006+0100 geo-esp-training[457:91293] Application quit abnormally! 2021-02-28 23:09:59.294003+0100 geo-esp-training[457:91293] Leaving

That's a global string variable: configfilename = 'geo-esp-train.cfg'

It's simply a filename. No path. In Android the OS automatically allocates a default folder for the app, where the file is automatically created. So I presumed that iOS works in a similar way?

PS: It's late night here in Europe, so I will go to bed now. :-)

I still haven't found a solution nor received any answered on the forums where I have posted my 'dlopen' problem. Someone asked me to try a newer iPhone, so I have bought an iPhone 7. My Python-Kivy app runs without any real problems on the iPhone 7 simulator (in Xcode). But the physical iPhone 7 gives the same error as the iPhone 5s. Here is the relevant part of the log output from Xcode: Got dlopen error on Foundation: dlopen(/System/Library/Frameworks/Foundation.framework/Versions/Current/Foundation, 1): image not found Got fallback dlopen error on Foundation: dlopen(/Groups/System/Library/Frameworks/Foundation.framework/Versions/Current/Foundation, 1): image not found Traceback (most recent call last): File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 252, in module File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 180, in init PermissionError: [Errno 1] Operation not permitted: 'geo-esp-train.cfg' 2021-03-10 14:18:50.105679+0100 geo-esp-training[448:20514] Application quit abnormally! 2021-03-10 14:18:50.161136+0100 geo-esp-training[448:20514] Leaving Please help! It's very important that I get this app to run on iOS!

Solved! It turns out that the fact that Xcode and iOS and dlopen could not find a 'Foundation.framework' 'image' was not the real problem. Python gave this error log: Traceback (most recent call last): File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 252, in module File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 180, in __init__ PermissionError: [Errno 1] Operation not permitted: 'geo-esp-train.cfg' 2021-03-10 14:18:50.105679+0100 geo-esp-training[448:20514] Application quit abnormally! 2021-03-10 14:18:50.161136+0100 geo-esp-training[448:20514] Leaving The solution was to actively specify in Python-Kivy that my data files have to be written to the app user data directory. This is how to do that: class RootLayout(FloatLayout): This is the root widget of my Kivy app def __init__(self, kwargs): super().__init__(kwargs) app = App.get_running_app() print("app.directory = ", app.directory) print("app.user_data_dir = ", app.user_data_dir) global configfilename, user_data_dir_path configfilename = os.path.join(app.user_data_dir, 'geo-esp-train.cfg') user_data_dir_path = app.user_data_dir Used for other data files.

Solved! It turns out that the fact that Xcode and iOS and dlopen could not find a 'Foundation.framework' 'image' was not the real problem. Python gave this error log: Traceback (most recent call last): File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 252, in module File "/Users/henrik/geo-esp-training-ios/YourApp/main.py", line 180, in __init__ PermissionError: [Errno 1] Operation not permitted: 'geo-esp-train.cfg' 2021-03-10 14:18:50.105679+0100 geo-esp-training[448:20514] Application quit abnormally! 2021-03-10 14:18:50.161136+0100 geo-esp-training[448:20514] Leaving The solution was to actively specify in Python-Kivy that my data files have to be written to the app user data directory. This is how to do that: class RootLayout(FloatLayout): This is the root widget of my Kivy app def __init__(self, kwargs): super().__init__(kwargs) app = App.get_running_app() print("app.directory = ", app.directory) print("app.user_data_dir = ", app.user_data_dir) global configfilename, user_data_dir_path configfilename = os.path.join(app.user_data_dir, 'geo-esp-train.cfg') user_data_dir_path = app.user_data_dir Used for other data files.

Sorry for not getting back earlier! Someone suggested that I tried a newer iPhone, so I bought an iPhone 7. But that didn't help. I get exactly the same problem. You say: "Visit the supporting site of that framework". Would that be the github page for Python-Kivy-iOS - https://github.com/kivy/kivy-ios/ ? I already tried posting an issue there, without any answers.... :-( Please help. It's important that I get this app to run on iOS!

OK. Interesting! Does that mean that this error is the result of the error I reported in another question, that has not yet been answered?: https://developer.apple.com/forums/thread/675071 - Got dlopen error on Foundation: (...): image not found

OK. I will try that. Thanks.

Yes! On a Kivy discussion forum on discord.com (Apple will not allow me to write the direct link here) someone showed me how to delete 2 Build Settings in Xcode containing 'simulator'. That solved it.

I solved the problem the primitive way, by looking at the pixel-format of all the default launch image PNG-files in the LaunchImages folder under the Xcode project my app-ios folder and overwriting them one by one with my (PNG) launch images of the same pixels size... It works for now.

Good question. :-) I guess I didn't really think about whether a "launchscreen storyboard" is a set of image files or what it is? :-)

After a long correspondance with Apple Developer Program Support they finally told me that the yellow "!" warning was just a general reminder that you need to fill out the whole page... Well... I find it quite misleading. And there are other strange peculiarities with the system: When I click on the specific build, the left column menu disappears, and I can't get it back. Not even by logging out and in again. But then I discovered that apparently the left column menu suddenly becomes an expand-/pulldown-menu just below the top menu line... This is a strange system - if you ask ME.