Cannot load locator created with ArcGIS Pro in ArcGIS Runtime SDK for WPF app

[SOTIRIOSTRIANTOS]

I created a POI locator using ArcGIS Pro. I have a wpf app and i want to use the created locator in that app.

I am trying to load it using the following code snippet.

            string streetMapOSMPath = AppDomain.CurrentDomain.BaseDirectory + "MapTest20200328_2.mmpk";
            string testmmpkPath = AppDomain.CurrentDomain.BaseDirectory + "test20230530.mmpk";
            string locatorPath = AppDomain.CurrentDomain.BaseDirectory + "GIS_test_20230_POI_Locator.loc";
            Uri _serviceUri = new Uri(locatorPath);
            try
            {
                // Load the package
                MobileMapPackage streetMapOSMPackage = await MobileMapPackage.OpenAsync(streetMapOSMPath);
                MobileMapPackage testMapOSMPackage = await MobileMapPackage.OpenAsync(testmmpkPath);

                // Load Geocoder
                //_geocoder = testMapOSMPackage.LocatorTask;
                  _geocoder = await LocatorTask.CreateAsync(_serviceUri);
}
            catch (Exception ex)
            {
                // Handle any exception
                System.Windows.MessageBox.Show(ex.Message, "Error opening package");
                return;
            }

I tried mmpk and .loc approaches with no success. i get LoadStatus: FailedToLoad.

Geocoder creation error: file too small to contain valid file header"

Any ideas?

[MarkBockenhauer · Accepted solution]

Which version of ArcGIS Pro did you use to create the locator? and which version of the Native Maps SDK are you using?

Then skipping ahead to a potential solution, there is an issue with Pro 3.1 creating locators that do not work in Native Maps SDKs 100.15.   The ArcGIS Pro 3.1.2 patch addresses this issue.

[SOTIRIOSTRIANTOS]

thank you, my SDK was 100.11 and it didnt work even with 3.1.2 patch, i updated to the latest SDK and it worked. Another thing that i noticed is that i cannot access all the fields in the returned result. i.e whilst in the poi locator i registered a phone number i cannot access that info through .net. Through ArcGIS Pro i can see that info. i want to use phone number as an insurance policy that locator's score is valid. is there something that i am missing when creating Locator task object or calling the geocoding method?