ServiceControl 5.2.1 – Patch release available

Hi everyone,

We’ve just released ServiceControl 5.2.1.

Fixed bugs

  • #4200 Retried messages and ServiceControl integration messages cannot be handled by older MSMQ endpoints

How to know if you are affected

You are affected if you are using a combination of:

  • ServiceControl 5.2.0 (earlier versions are not affected)
  • NServiceBus.Transport.Msmq 1.0.x or NServiceBus 6.x (or earlier)


Retried messages and ServiceControl integration messages cannot be handled by endpoints. The messages are moved to the error queue and the endpoints log a warning similar to:

2024-05-24 09:50:35.097 WARN  Message '7e47b130-25e6-4b43-baf0-2339b773687a\105607' has corrupted headers
System.InvalidOperationException: There is an error in XML document (1, 1). ---> System.Xml.XmlException: Data at the root level is invalid. Line 1, position 1.
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
   at System.Xml.XmlReader.MoveToContent()
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1.Read3_ArrayOfHeaderInfo()
   --- End of inner exception stack trace ---
   at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
   at NServiceBus.Transport.Msmq.MsmqUtilities.DeserializeMessageHeaders(Message m)
   at NServiceBus.Transport.Msmq.MsmqUtilities.ExtractHeaders(Message msmqMessage)

When to upgrade

You should upgrade immediately if you are affected.

Where to get it

You can download the new version of ServiceControl from our website.

With thanks,
The team in Particular

Please read our support policy for more details.