How To Fix ACI_API021 - XMLNODE accepts only IF_IXML_ELEMENT or IF_IXML_DOCUMENT instances

SAP Error Message - Details

• Message type: E = Error

• Message class: ACI_API - EXPERIMENTAL, DON'T USE (Messages raised by the ACI's API)

• Message number: 021

• Message text: XMLNODE accepts only IF_IXML_ELEMENT or IF_IXML_DOCUMENT instances

What causes this issue?

Valid AST nodes can only correspond, in the XML DOM, to instances of the
IF_IXML_ELEMENT or IF_IXML_DOCUMENT interfaces. This is why no other
values can be passed to the XMLNODE parameter.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ACI_API021 - XMLNODE accepts only IF_IXML_ELEMENT or IF_IXML_DOCUMENT instances ?

  The SAP error message ACI_API021 indicates that there is an issue with the XML processing in your ABAP program. Specifically, it means that the method or function you are trying to use expects an instance of the interface IF_IXML_ELEMENT or IF_IXML_DOCUMENT, but it received an incompatible type instead.
  Cause
  This error typically occurs when:
  
  You are trying to pass an object that is not of the expected type to a method that requires an XML element or document.
  There may be a mismatch in the expected and actual data types in your XML processing logic.
  The XML structure you are working with is not being correctly instantiated or manipulated.
  
  Solution
  To resolve this error, you can follow these steps:
  
  
  Check Object Type: Ensure that the object you are passing to the method is indeed an instance of IF_IXML_ELEMENT or IF_IXML_DOCUMENT. You can use the TYPEOF statement to check the type of the object before passing it.
  DATA: lo_xml_element TYPE REF TO if_ixml_element.
  DATA: lo_xml_document TYPE REF TO if_ixml_document.
  
  " Example of checking the type
  IF lo_xml_element IS NOT BOUND.
      " Handle the case where the object is not bound
  ENDIF.
  
  
  Instantiate Correctly: If you are creating an XML element or document, make sure you are using the correct factory methods to instantiate them. For example:
  DATA(lo_xml_document) = cl_ixml=>create_document( ).
  DATA(lo_xml_element) = lo_xml_document->create_element( 'YourElementName' ).
  
  
  Review Method Calls: Go through the method calls in your code and ensure that you are passing the correct types. If a method expects an XML element, make sure you are not passing a string or another type.
  
  
  Debugging: Use the ABAP debugger to step through your code and inspect the types of the objects being passed around. This can help you identify where the type mismatch is occurring.
  
  
  Consult Documentation: If you are using specific SAP classes or methods, refer to the SAP documentation for those classes to understand the expected input types and how to properly use them.
  
  
  Related Information
  
  IF_IXML_ELEMENT: This interface represents an XML element in the SAP XML processing framework.
  IF_IXML_DOCUMENT: This interface represents an entire XML document.
  SAP XML Processing: Familiarize yourself with the SAP XML processing framework, which includes classes and interfaces for creating, manipulating, and parsing XML data.
  
  By ensuring that you are working with the correct types and instantiating your XML elements and documents properly, you should be able to resolve the ACI_API021 error.