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Obtaining Provider Manifests

Message Analyzer traces are based on ETW providers, which operate in an infrastructure that enables you to capture ETW events on your system. For Message Analyzer to be able to parse ETW messages from a particular provider, it must have a manifest for that provider. The manifest is a configuration file that defines the schema or format of the data that is delivered by the provider. When starting a trace that is configured to use a specific system ETW provider, Message Analyzer typically obtains the required system manifest from the .exe or .dll of the registered provider component and builds an OPN description to represent its messages. This OPN description is then compiled and temporarily loaded to the Runtime so it can parse the ETW messages. If a trace file is saved and then transferred to another system, that system may not have the same provider components or component versions necessary to enable parsing of the ETW messages.

This issue can be resolved in either of the following ways:

  • The manifest information must be saved with the trace.

  • The manifest file must be manually generated and stored on the new system.

For example, you might have an event trace log (ETL) that utilized an ETW provider that is not registered in the particular system on which you are running Message Analyzer. As a result, Message Analyzer will not have access to the provider manifest and will therefore be unable to parse messages from that log. However, if the manifest was previously included with the log you are importing, Message Analyzer will be able to parse the messages in the ETL file.

You might also save trace data on a source computer that will be further processed on other destination systems where the provider versions are unknown. If this is the case, Message Analyzer accommodates this situation by automatically saving trace data with the manifests of the underlying provider/s that were used in the trace. This ensures that Message Analyzer will be able to parse the ETW message data on the destination computer. Likewise, if you are importing data from an ETL file into Message Analyzer and you suspect that an unknown provider configuration was used to capture/log the data, you can generate a manifest for the log to ensure that Message Analyzer can parse its messages, as described in the section that follows.


More Information
To learn how to generate a provider manifest, see Generating a Provider Manifest.

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