How To Fix ADT_DATAPREVIEW_MSG012 - Cannot open AMDP data preview as the class '&1' contains syntax errors

SAP Error Message - Details

• Message type: E = Error

• Message class: ADT_DATAPREVIEW_MSG - Messsage Class for data preview

• Message number: 012

• Message text: Cannot open AMDP data preview as the class '&1' contains syntax errors

What causes this issue?

Cannot open AMDP Data Preview as the class contains the syntax errors

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?

Resolve the syntax errors to open the Data Preview

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 ADT_DATAPREVIEW_MSG012 - Cannot open AMDP data preview as the class '&1' contains syntax errors ?

  The SAP error message ADT_DATAPREVIEW_MSG012 indicates that there are syntax errors in the ABAP Managed Database Procedure (AMDP) class that you are trying to preview. This error typically occurs in the ABAP Development Tools (ADT) when you attempt to open the data preview for an AMDP method, but the underlying class has not been correctly defined or contains errors.
  Cause:
  
  Syntax Errors: The most common cause is that there are syntax errors in the AMDP class or method. This could be due to typos, incorrect ABAP syntax, or issues with SQL statements.
  Inconsistent State: The class might be in an inconsistent state due to previous unsuccessful activations or changes that have not been saved.
  Dependencies: There may be dependencies on other classes or database objects that are not correctly defined or activated.
  
  Solution:
  
  Check Syntax: Open the AMDP class in the ABAP editor and check for syntax errors. You can do this by using the syntax check feature (Ctrl + F2) or by activating the class (Ctrl + F3) to see if any errors are reported.
  Activate the Class: Ensure that the class is activated. If there are any errors during activation, resolve them before trying to open the data preview again.
  Review SQL Statements: If your AMDP method contains SQL statements, ensure that they are correctly written and valid for the database you are using.
  Check Dependencies: Verify that all dependent objects (like tables, views, or other classes) are also activated and do not have errors.
  Clear Cache: Sometimes, clearing the cache or refreshing the project in ADT can help resolve issues related to stale data.
  Debugging: If the issue persists, consider debugging the AMDP method to identify any runtime issues that may not be apparent during static checks.
  
  Related Information:
  
  AMDP Overview: ABAP Managed Database Procedures allow you to write database procedures in ABAP that can be executed directly in the database layer, improving performance for certain operations.
  ADT Tools: The ABAP Development Tools (ADT) provide a modern development environment for ABAP programming, including features for syntax checking, debugging, and data preview.
  Documentation: Refer to the official SAP documentation for AMDP and ADT for more detailed information on best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify and resolve the syntax errors causing the error message ADT_DATAPREVIEW_MSG012.