Category: Microsoft Dynamics 365

Fixed – The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters exception in Plugin (Dataverse / Dynamics 365)


Recently for one of our plugins, that moves attachments to the Azure Blob Storage, we got the below exception.

BlobFileName: WFU000069107_Inside Install – CFC__2024_03_03_12_24_05_179_temp.jpg
Caught Exception: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
at System.Convert.FromBase64_Decode(Char* startInputPtr, Int32 inputLength, Byte* startDestPtr, Int32 destLength)
at System.Convert.FromBase64CharPtr(Char* inputPtr, Int32 inputLength)


We were getting errors while trying to use the FromBase64ToString method to decode the Base64 encoded string into its original byte array.

Seemed there were some issues with the image uploaded, even from the browser when trying to download we were getting the below exception.

The solution was to check if it is a valid Base64 encoded string before converting it to a byte array and if not skip it and process other attachments in the plugin.

const string base64Pattern = @"^[A-Za-z0-9+/=]*$";

Hope it helps..

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The ‘operationOptions’ property is not allowed on the trigger when the workflow contains actions of type ‘OpenApiConnection- Power Automate


Recently while trying to save one of our cloud flows having a “When a HTTP request is received” trigger, we got the below error message after adding the “List Rows” (Dataverse) action


Request to XRM API failed with error: ‘Message: Flow client error returned with status code “BadRequest” and details “{“error”:{“code”:”InvalidOpenApiFlow”,”message”:”Flow save failed with code ‘ValueNotSupported’ and message ‘The trigger ‘manual’ at line ‘1’ and column ‘835’ is not valid. The ‘operationOptions’ property is not allowed on the trigger when the workflow contains actions of type ‘OpenApiConnection’.’.”}}”. Code: 0x80060467 InnerError: ‘.

This error occurs when you try to enable the “Suppress Headers” or “Schema Validation” option for the “When a HTTP request is received” trigger while also using actions that connect to Open API (OpenApiConnection) services within the same flow. Seems like a current limitation in Power Automate. The workaround could be to create a separate child flow having the action associated with Open API Services and use these options in the Parent flow.

More details here – https://powerusers.microsoft.com/t5/Building-Flows/HTTP-trigger-suppress-headers-gives-error/td-p/1815900

Hope it helps..

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ILMerge / Dependent Assemblies in Plugin – System.IO.FileNotFoundException: Could not load file or assembly ‘System.Memory.Data’ – Dynamics 365 / Dataverse


Recently in one of our Plugins, which was using Azure.Storage.Blobs and Azure.Storage.Common libraries to move attachments from notes to Azure Blob Storage suddenly started throwing the below exception. The Plugin had been working fine and had been deployed long back to the production environment.

System.TypeInitializationException: The type initializer for ‘Azure.Response’ threw an exception. —> System.IO.FileNotFoundException: Could not load file or assembly ‘System.Memory.Data, Version=1.0.2.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51’ or one of its dependencies. The system cannot find the file specified.

We raised the Microsoft Support for it and were informed that the reason for this was there was a platform update over that particular weekend to stop loading the “System.Memory.Data” assembly on the plugin server. And as we hadn’t included that assembly in our package (ILMerge), we started getting the exception.

Also as per Microsoft Docs


So the quick fix at that time was to include (set Copy Local as True) for that System.Memory.Data along with Azure assemblies.

Also now we can look into using Plugin Package to package the dependent assemblies.

Hope it helps..

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The plug-in execution failed because the Sandbox Worker process crashed. This is typically due to an error in the plug-in code – Dataverse / Dynamics 365


Recently we got the below exception for one of our plugins.

Message: The plug-in execution failed because the Sandbox Worker process crashed. This is typically due to an error in the plug-in code. Please refer to this document: https://go.microsoft.com/fwlink/?linkid=2189390
Microsoft.Xrm.RemotePlugin.Grpc.ExceptionHandlers.SandboxFabricWorkerCommunicationException: Error communicating with SandboxFabric Worker —> Grpc.Core.RpcException: Status(StatusCode=”DeadlineExceeded”, Detail=”Deadline Exceeded”

If we refer to Microsoft Documentation below seems to be the cause of the issue in our case.

In our scenario, we had a Plugin that was Asynchronous and it was triggered on the Post Update of Work Order Service task. The plugin will fetch all the attachments (to notes associated with inspection attachments > inspection response > work order service task). There were many Service Tasks having more than 20 attachments exceeding 100 mb size total.

We were doing bulk updates which triggered the plugin creating too many requests eventually leading to that error.

Get more details – Error “Sandbox Worker Process Crashed”

Also, check – https://cloudblogs.microsoft.com/dynamics365/it/2017/02/20/microsoft-dynamics-365-online-asynchronous-service-quotas/

Fixed – System.InvalidOperationException: Message size exceeded when attempting to send response to sandbox. Message Size 123 Mb. Max Allowed 128974848 Mb (Dataverse / Dynamics 365 )

Hope it helps..

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Only notes are available in Offline mode. Please check your internet connection to view other timeline records – Dataverse / Dynamics 365


We were recently exploring the Dynamics 365 Field Service mobile app, we saw that for the users with a mobile offline profile configured – Add the user to an offline profile, when they go offline they will see the below message –

“Only Notes are available in offline mode. If you would like to view your other items, please reconnect to online mode when possible”. 

What it means is that if users go offline, only the Notes records (along with the attachment) will be available on the timelines. The users can also add/remove attachment in the offline mode. This capability was added as part of the 2019 Release Wave 2

Offline Supported Capabilities –

Hope it helps..

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Fixed – Duplicate records in Azure Synapse Link (Dataverse)


Recently for some of our Dataverse environments, we found duplicate records getting created (same GUID) for Notes and Work Order Incident tables in the corresponding CSV files.

Here we were using In place update – In-place updates vs. append-only writes

This was causing the Power BI reports built on top of it to fail.

On raising the ticket, the Microsoft Support team mentioned that this is a known bug for certain regions, and they immediately ran the de-duplication scripts in the background which quickly fixed the issue for us. Also, they specified they will be deploying the fix for the issue in the coming days.

Hope it helps..

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