Hi @hmafzal
I would agree with Sreekanth , the problem is unclear.
Can you provide more details on these
What is the exact input provided to service xmlStringToXMLNode in step 1 of your flow?
What is the expected output from documentToXMLString in step 3?
If you already have an xmlString as an input , then you can directly save that as a file , I’m wondering why you need to pass it through the different services?
Which step of the flow are you seeing this error in? Is it in the first step?
-NP
#Integration-Server-and-ESB#webMethods#Service-Designer