I have an application that is currently in production now, and the app is connected to app center to check for crashes/errors. I'm having this certain error on the logs "System.ObjectDisposedException: Cannot access a disposed object. Object name: 'Xamarin.Forms.Platform.Android.AppCompat.MasterDetailPageRenderer'." but I do not know how it occurs, any help on how to replicate the scenario to produce the error or how to fix it?.
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I have an android app created with Genexus. In this, I have a grid created with work with smart device. I can insert and update records but when I try to delete it, after I confirm I get the error "Unauthorized", no other explanations. It works in local and in our test server, but not in our production server. What could be causing this problem?
Surely something is missing in the deploy. Anyway, the best thing you can do is turn on the "log level = debug" property, under the "Logging" node of your main object, and see the error log to know specifically what is happening.
I received the above error when using the SwiftUI previews feature and can't figure out why this happens. The error always looks something like this:
GenericHumanReadableError: unexpected error occurred
messageRepliedWithError("Connecting to launched interactive agent 1894", Optional(Error Domain=com.apple.dt.xcodepreviews.service Code=17 "connectToPreviewHost: Failed to connect to 1894: (null)" UserInfo={NSLocalizedDescription=connectToPreviewHost: Failed to connect to 1894: (null)}))
I managed to figure out a good way to debug this, please see below
If you head into /Users/USERNAME/Library/Logs/DiagnosticReports you will see the latest crash reports. Open the most recent one (should start with your app name), and it should tell you the reason the app crashed. It'll look something like this:
Application Specific Information:
Fatal error: This request requires an authenticated account: file /Users/USERNAME/Work/AppName/Models/CloudKitAlbumManager.swift, line 101
In my case, it was a fatalError i threw in development for debugging. The previews loads your app and thus call your whole stack and will crash if you like me throws fatalErrors for debugging.
I hope this helps
I am building a NativeScript mobile app and among other things I am capturing for analytics purposes, I need to capture "app crashes" possibly with errors/reasons it crashed.
I came across this SO post but there it was in the response of a question on how not to let the app crash. Following was suggested to catch crash events:
var application = require("application");
application.on(application.uncaughtErrorEvent, function (args) {
if (args.android) {
// For Android applications, args.android is an NativeScriptError.
console.log("NativeScriptError: " + args.android);
} else if (args.ios) {
// For iOS applications, args.ios is NativeScriptError.
console.log("NativeScriptError: " + args.ios);
}
});
If I go by the above then I have the following questions. Would appreciate if somebody can confirm if this means every-time the app is crashing it will generate this application.uncaughtErrorEvent event? Can I rely on it?
If it is true then maybe I can make a REST call to my backend and store date, time and whatever is in args.android or args.ios.
If above is not the correct way then can somebody please help me on how to go about doing this?
Any help is highly appreciated. Thank you!
The application.onUncaughtError will be hit probably 95-98% of the time during a crash; it is pretty reliable. I have seen the app crash without any notice at all it just goes poof, but I'm not sure any reporting system can handle that one.
The way I do it is during the app startup I register a couple things:
I create a global.error function; this is used for anything (like try/catch, promise/catch) that needs to send the errors through to be logged remotely. So anywhere in my codebase I can do a global.error(theError); and it will be handled; this way I do NOT have to worry about trying to load or require things while an error is taking place, as that can cause other errors.
I use the onUncaughtError event to catch anything that is not normally caught, and then notify the user that an error has occurred and quit the app. (in this case, trying to recover is not recommended as you have no idea where the error was thrown from...)
If I use a worker thread, When I startup a worker I register the worker.onerror to forward its data to the main threads global.error function AND I have a specific message from the workers' version of the global.error that sends the error back to the primary thread. This way if the worker itself calls global.error that message is passed back to the main thread and then to the global.error on the main thread which handles everything properly.
This technique allows me to catch pretty much all errors that can occur. The main global.error function and the onUncaughtError both use a simple reporting library that I built that reports all the data back to one of my servers, IF the device is online. If the device is offline, it can optionally save the data to a reporting file to be uploaded later; or just ignore it.
It also has safety checks to verify the error isn't a network error (we don't want the error reporting to go into a loop, i.e. trying to report the error causes an error, which then tries to report the error; so in the event it is a certain type of network error; it will ignore those. )
I have a datasnap server configured for HTTPS, this starts and runs fine as far as I can tell.
From the client's point of view when I 'Generate datasnap client classes' via the TSQLConnection component I get an error message - Error getting server certificate.
Can anybody offer any useful info regarding this and how to fix it?
Thanks,
Appears to be a bug with the TDSCertfiles component in the Server project.
Having set the following properties programmatically, the bug seems to ignore what I have put in code and looks for what is set manually in the object inspector (empty) :
Cerfile
Keyfile
RootCertfile
FIX - After setting the above properties and before calling DSHTTPService.Start add the following :
DSCertFiles.SetServerProperties(DSHTTPService.HttpServer).
Retesting the connection/Generating server methods from my client app, I no longer get the error message and it successfully connects.
I have problem with launching Google-Cast application similar to sample CastHelloText-chrome. I slightly modified example code for my specific purposes. The goal for creating this application is to send and show image data directly in Chromecast device.
Particularly the difference between official sample and my code is in message format and its content, sent by sender application. Sender application took png image coded by base64 and send through message bus with custom namespace. Receiver application get this message and use this as data source for html object <img>.
Error appears when I do this steps:
Reload sender page, checking console if any device found.
Send the form by just pushing enter on input box (text is ignored).
Now a popup from Chromecast extension shows. Next there are two scenarios:
3a) I confirm casting to device by choosing one from the list, then I get this error message in console:
onError: {"code":"channel_error","description":"Error: Timeout","details":null}
3b) I just click somewhere else, I get this error:
onError: {"code":"cancel","description":"User closed popup menu","details":null}
Both of errors are caused by calling function chrome.cast.requestSession in chromehellotext.html at line 161, but what's really wrong I don't know.
When I step sender script I realize that function sessionListener is never called. I know that something go wrong when code try to call chrome.cast.requestSession, where described error raises. So I need help if I missed about right way to use Google-Cast API or If this problem has something to do with networking issues.
Receiver application is registered on Google Cast SDK Developer Console and I'm testing on registered device with some serial number. I'm using Google Chrome in version 42.0.2300.2 canary (64-bit) and Chrome version 40.0.2214.111 (current stable I suppose). For testing I also tried to turn off Windows Firewall entirely but with no luck.
Edit:
There were some syntactic errors that caused error message described above.
It seems like you are trying to use the data/control channel to send an image; please don't do that; that channel is not meant to be used for large data communications; in fact it cannot send anything which approaches or exceeds 64k. If your goal is to send images from your local machine, you would need to run a local web server on your local machine and serve images through the web server.
For and easiest tutorial you can have a look to this tutorial.
It is well explained in this tutorial.
Chromecast Sender application
There is no need to maintain session by yourself.
just add button and enjoy casting
mCastManager.addMediaRouterButton(mediaRoutebtn);
I found a source of my problem. There was something wrong in receiver code - syntactic and runtime errors, so I must admit that my code wasn't functional. Now its working in terms of launching application and getting session.
Unfortunate thing is that the error message generated by Chromecast extension didn't match the actual error - at least it was a bit confusing when I didn't know what's really happening on receiver side without ability to debug the code.