First of all, you don't need to use both GetFile and FetchFile. GetFile is fine, but if you want to use FetchFile, it must be used in combination with ListFile. See article about List/Fetch pattern. Then you want to send the path in the flow file attributes, not in the content. And there is a slash missing at the beginning of your XPath expression. And now I realized that I misunderstood what you are trying to achieve. I didn't understand that you have two different files with one containing the destination path. I thought it was one single file. So... basically, what I suggested is not going to be OK. But just in case, here is a template with what I had in mind. xpath.xml
Now let's focus on your use case. 🙂 You want to use a Lookup controller service that points to your configuration file. Then you can reference your controller service into a LookupAttribute processor that will extract the value from your configuration file and that will set it as an attribute of your flow file. Then the flow becomes: listFile, FetchFile, LookupAttribute, PutFile. Here is a template that should fulfill your requirements (just change the paths as needed). Don't forget that controller services are defined at process group level. Also note, if I'm correct, that this template requires latest version of NiFi to get it working. xmllookup.xml
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