XML Parser Exception on Punch Out Setup Request

Question

I am on the supplier side of the procurement process. Recently I was tasked with bringing on a new buying group, but we have encountered a strange issue. The buyer set up my company in their ERP system, however they are getting an error when trying to punch out to my website...which is listed below.
Error Code: 400 Invalid XML Format In Login Response Document Unable to parse the Login Response XML.
XMLParserException
oracle.xml.parser.v2.XMLParseException: End tag does not match start tag 'meta'.
at oracle.xml.parser.v2.XMLError.flushErrors1
After some investigation, I am confident the problem resides in the buyers BrowserFormPost URL. The problem seems to be that instead of using "&" for ampersand between the URL variables, it is passing in the & symbol (& is a protected character in XML), which is causing the Oracle XML parser to throw this exception. As a result, the set up request is never getting to me.
The buyer has opened a couple of tickets now with Oracle support, but both times the ticket has been closed and the buyer has been instructed to contact the supplier (me). I don't know enough about the buyer side Oracle system to instruct them on how to fix this issue. Any help would be greatly appreciated.

Answer 1

Hi Rakesh,
You need to have an S-User ID to access SAP Notes. For your convenience, I am pasting the content of SAP Note 954035.
Process, block and CO could not be created in GP
Symptom
After upgrade of SAP-EU component to version 7.0 SP8 in Guided Procedures process, block and callable object could not be created. On design time screen   appears error message:
com.sap.engine.lib.xml.parser.ParserException: XMLParser: Bad attribute list. Expected WhiteSpace, / or >:(:main:, row:1, col:491)
During attempt to start process through the Runtime screen you will get an error message:
Cannot load callable object container:
Failed to get Related Model Object for the object
com.sap.caf.eu.gp.ui.actions.decpage.
CDecisionPageInterfaceViewdecisionPageUsage1,relation View
In SP9, the following message could be found:
Failed to get Related Model Object for the object com.sap.caf.eu.gp.ui.co.exec.decision.COExecDecision
Proceed as stated for SP8.
Other terms
This is WebDynpro problem caused by an inconsistency of versions.
Solution
      1. Redeploy the SCA SAP-EU (if redeployment does not help undeploy and deploy again) components:
          o caf/eu/gp/ui/dt/comp/cons,
          o caf/eu/gp/ui/dt/comp and
          o caf/eu/gp/ui/actions  from software component SAP-EU
or
      2. Apply the SP8 patch 1 if you upgrade to SP8. Both components mentioned below will be updated:
          o caf/eu/gp/ui/dt/comp/cons
          o caf/eu/gp/ui/dt/comp
See if it solves your problem.
Bye
Ankur