POS: Product availability panel stopped working (error)

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There are multiple extension samples provided by Microsoft together with POS solution. One of them is ‘Product availability’ panel that displays real-time stock level of the product.

After retail update to 7.3.11971.64069 version ‘Product availability’ panel stopped working – started to display error.

Let’s find out what is wrong and how we can fix the panel.

Why issue happens

‘Product availability’ sample was not changed to become compatible with a new version of ‘Product availability’ functionality on Retail server. As the result, Retail server throws the following exception:

An error occurred while trying to send all bufferred output to the client. Exception: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
   at System.ThrowHelper.ThrowKeyNotFoundException()
   at System.Collections.Generic.Dictionary2.get_Item(TKey key)
   at Microsoft.Dynamics.Retail.RetailServerLibrary.ODataControllers.OrgUnitsController.SearchProductAvailability(ODataActionParameters parameters, ODataQueryOptions`1 queryOptions)
   at lambda_method(Closure , Object , Object[] )

Error from Fiddler:

“TypeName”: “CommerceException”,
“Exception”: “{\r\n \”ErrorResourceId\”: \”Microsoft_Dynamics_Internal_Server_Error\”,\r\n \”LocalizedMessage\”: \”Beim Verarbeiten dieser Anforderung ist ein Fehler auf dem Server aufgetreten.\”\r\n}

What parameters are required by Retail server

Look through retail server metadata: searchProductAvailability function requires 2 parameters: productId and orgUnitAvailabilitySearchCriteria

How CPOS request to Retail server looks now

CPOS request to retail server contains only one parameter – productId, that causes the issue.

How CPOS request should look like

Add the parameter orgUnitSearchCriteria to CPOS request – and the issue will be fixed, ‘Product availability’ panel will work well.