How To Fix CNV_DMC_MC_EXCEPTION202 - The access type ôLOOP AT TABLEö is not used correctly; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 202

• Message text: The access type ôLOOP AT TABLEö is not used correctly; see long text

What causes this issue?

If you use the access type ?LOOP AT TABLE? to map a source structure to
a target structure, then all superordinate nodes of the target structure
should not use the access type ?LOOP AT TABLE?.

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 CNV_DMC_MC_EXCEPTION202 - The access type ôLOOP AT TABLEö is not used correctly; see long text ?

  The SAP error message CNV_DMC_MC_EXCEPTION202 indicates that there is an issue with the way the access type "LOOP AT TABLE" is being used in the context of a data migration or conversion process, typically related to the Data Migration Cockpit (DMC) or similar tools.
  Cause:
  The error usually arises from one of the following reasons:
  
  Incorrect Loop Syntax: The syntax used for the "LOOP AT TABLE" statement may not conform to the expected structure. This could include issues like missing or incorrect declarations.
  Data Structure Issues: The internal table being looped over may not be properly defined or may not contain the expected data.
  Contextual Misuse: The loop may be used in a context where it is not appropriate, such as within a function module or method that does not support it.
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check Syntax: Review the ABAP code where the "LOOP AT TABLE" statement is used. Ensure that the syntax is correct. A typical loop structure looks like this:
  LOOP AT it_table INTO wa_table.
      " Your processing logic here
  ENDLOOP.
  Make sure that it_table is defined as an internal table and wa_table is defined as a work area.
  
  
  Validate Data Structure: Ensure that the internal table you are looping through is properly populated and defined. You can use debugging tools to inspect the contents of the table before the loop.
  
  
  Context Review: Ensure that the loop is being used in a valid context. If it is within a method or function module, check if there are any restrictions on using loops.
  
  
  Consult Documentation: Refer to the SAP documentation or the long text associated with the error message for additional context and guidelines on proper usage.
  
  
  Testing: After making corrections, test the code to ensure that the error is resolved and that the data processing works as intended.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  ABAP Documentation: Review the ABAP programming guidelines for best practices on using internal tables and loops.
  Community Forums: Consider searching or posting on SAP community forums for insights from other developers who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with a colleague or reach out to SAP support for further assistance.