System.UnauthorizedAccessException - "Access to the path /Unity is denied"

Hi Uniteers, we are encountering an error when building for Android. We are receiving the following error:
System.UnauthorizedAccessException - "Access to the path /Unity is denied". We are running Unity 5.4.0f3 and are using "Internal only" for write access. We are saving using Application.persistentDataPath. We haven't tested iOS or External (SDCard) for write access. Game runs fine in editor. Additionally, Unity integrated IAP system is having problem saving cache data, because of this error.

Anyone have an idea? I have never encountered this problem before. My best hunch is that it is a Unity 5.4 error, based on a recent google search find, I found this recent submitted error: http://pastebin.com/vLBFk6U7.

 

No takers? I haven't yet found a solution for this. It appears that if I set write access to SDcard the problem is resolved, however, this is not ideal.

 

I'll take it back. Setting Write Acces to SDcard produces similar issues. We are pretty stuck at this point.

 

Alright, I found this Stackoverflow thread which told me to simply restart my device...
http://forum.unity3d.com/threads/sy...on-access-to-the-path-unity-is-denied.426841/

For me, this all point towards a Unity 5.4 bug, and I'll submit a bug report asap.

 

We are receiving the same error since Unity 5.4. Seems like a bug. Did you already submitted a bug report?

 

I submitted a bug report, but I am not sure if I did it properly. I hope they will respond if they find my report inadequate.

 

Hi. I'm having the exact same problem as you describe after upgrading to Unity 5.4.1f1. Were you able to find a solution? Or at least were you able to submit a bug report correctly?

 

Same bug here for Unity 5.4.1f1

 

Seems I'm having the same issue but I can hardly advise my users to restart their devices :-/

Did you guys find a workaround for the bug?

 

Alright, as far as I have observed, this appears to only be a problem for certain devices. My old HTC One have not always had this problem, but after some update of Unity I have had this issue. I never found a solution to this, but apparently, I am also one of the only people experiencing this issue.

 

i have experienced it just today and i cant find a solution... it work si f i set in PlayerPrefs 'Write Permission' to External (SDCard), but i don't want users have to give this kind of permission.

Update: After reseting my Android device it seems to work again, not a fair solution but enough for me right now

 

I got this bug in today.

Here's what happen:
0. Installed an release version.
1. Installed an development version of my app
(this dev version wiped my game data clean)
2. Switch back to a release version.
(do not cleared any data)
4. Got UnauthorizedAccessException.

I tested this with a blank project. Bug confirmed, at least for me. Using 5.4.1f1, if some one don't mind please test with the newer versions. (The project is attached)

Any ideas why this happend?

 

I tried using the example project and your guide, but I couldn't reproduce the bug in 5.5.1f1

 

We used to run into this problem on some certain devices, so we are using this workaround, and are now seeing 0 problems related to this (on android).

private static string GetAndroidFriendlyFilesPath()
{
#if UNITY_ANDROID
AndroidJavaClass up = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity = up.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject applicationContext = currentActivity.Call<AndroidJavaObject>("getApplicationContext");
AndroidJavaObject path = applicationContext.Call<AndroidJavaObject>("getFilesDir");
string filesPath = path.Call<string>("getCanonicalPath");
return filesPath;
#endif
return Application.persistentDataPath;
}

private static string GetAndroidFriendlyCachePath()
{
#if UNITY_ANDROID
AndroidJavaClass up = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity = up.GetStatic<AndroidJavaObject>("currentActivity");
AndroidJavaObject applicationContext = currentActivity.Call<AndroidJavaObject>("getApplicationContext");
AndroidJavaObject path = applicationContext.Call<AndroidJavaObject>("getCacheDir");
string filesPath = path.Call<string>("getCanonicalPath");
return filesPath;
#endif
return Application.temporaryCachePath;
}

 

Thank you very much hjalle!!!! Your solution worked like a sharm

 

Hi,

Our project is having the same problem except on IOS devices instead of Android. This is on an Iphone 7+ on the latest OS. Our storage external in Unity. We can save text files fine, however trying to save an image gets denied.

The image saving is simply converting a texture2D into a byte array and using File.WriteAllBytes to the directory.

Our .csv files are saving to "Application.persistantDataPath + MyProject/Saves/filename.csv", while our images are saving to "Application.persistantDataPath + MyProject/Images/images.png" (myproject name changed for privacy)

Thanks

 

I had the same problem - but I noticed I had created the folder via windows as I thought about the permission system - i can see why it might give an error.. So I went ahead and deleted the folder, then had my program in Unity create it instead.. now there are no problems.. Here's a sample of the working code:

string s_saveFolder = "Assets/Sales/Saves/";
try
{
if (!Directory.Exists(s_saveFolder))
{
Directory.CreateDirectory(s_saveFolder);
}

DirectoryInfo dir = new DirectoryInfo(s_saveFolder);
FileInfo[] info = dir.GetFiles("*.txt");
foreach (FileInfo f in info)
{
Debug.Log("readying in files: " + f.Name);
}
}
catch (IOException ex)
{
Debug.Log("IOException ex" + ex.Message + " ... " + ex.StackTrace);
System.Console.WriteLine(ex.Message);
}

 

NOTE -- i DID create the 'Sales' folder off of Assets via the Windows file system (if I remember correctly).. If there's a problem still for yours, perhaps create the folder via the Unity Projects window...

 

The solution is to Build and Save the apk in the project folder and file name with "MyGame.apk" (That worked for me)

 

The Same Bug i face in Unity 2018.4.26f1 what the hell with the unity i tried to build apk for last two days but the results are f... i 4 times uninstall SDK and re install and two times unity but the error occur again .The benefit of doing this the nature of error changed know this error occur during i reach on this page now i start downloading new Unity 2019.4 LTS because it seems 2018 is bugy ...

 

Did going to 2019 help? I've been recently experiencing this issue as well only on certain devices.

 

Starting with api level 29 storage permissions are handled a bit differently. See https://developer.android.com/about/versions/11/privacy/storage for some more info.
When you target api level 29 you can add android:requestLegacyExternalStorage="true" to the android manifest (https://developer.android.com/training/data-storage/use-cases#opt-out-scoped-storage).
At least that fixed it for me and I was mainly having issues on a device that runs Android 10 (api level 29)

 

Thanks to the T3r0 response. It actually solve the issue otherwise you just keep getting the exception even when you are supposed to have write permission.

 

Thank you that fixed it for me.
For anyone wondering, you have to add it to the application tag, like this :

Code (CSharp):

1. <application android:requestLegacyExternalStorage="true"

 

I added the attribute and it didn't work at first. restarted my computer and it worked. thank you.

 

Deleted the Library directory in Windows Explorer and it went away after Unity rebuilt the directory. I originally built the project on a Google Drive synced folder and moved it so Drive didn't cause problems I think Drive's file syncing screwed it up.

 

This error just started inexplicably happening for me when I use Application.persistentDataPath. The file path Unity was returning this way was clearly not writable in Android and it would break my function.

I switched to the above method and now I am again getting a read/writable path.

Is there something buggy about Unity's method of getting this path that should be fixed by Unity? Why is this happening? For now I will just use this new method, but if this new method is still needed 6 years later, why not make it the core Unity method?

Or is there at least any explanation for why Application.persistentDataPath would return a usable directory for months on the same device then suddenly not return a writable path while this alternative still does?

Thanks