How To Fix FR660 - Data type of field &1 is not permitted for structure generation

SAP Error Message - Details

• Message type: E = Error

• Message class: FR - Messages for FI Reporting

• Message number: 660

• Message text: Data type of field &1 is not permitted for structure generation

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message FR660 - Data type of field &1 is not permitted for structure generation ?

  The SAP error message FR660 indicates that there is an issue with the data type of a field in a structure that is being generated. This error typically arises during the generation of structures in the context of data dictionary objects, such as when creating or modifying tables, views, or data elements.
  Cause:
  The error occurs when the data type of a field in the structure is not compatible with the requirements for structure generation. Common causes include:
  
  Invalid Data Type: The field is defined with a data type that is not allowed for structures (e.g., certain complex types or unsupported data types).
  Inconsistent Length: The length of the field may not be appropriate for the structure.
  Field Attributes: The field may have attributes that are not compatible with structure generation, such as being marked as "reference" or having certain technical settings.
  
  Solution:
  To resolve the FR660 error, you can take the following steps:
  
  
  Check Data Types: Review the data types of the fields in the structure. Ensure that they are compatible with structure generation. Commonly used data types for structures include:
  
  CHAR
  NUMC
  DATS
  TIMS
  DEC (for decimal numbers)
  
  
  
  Modify Field Attributes: If any fields have attributes that are not suitable for structures, consider modifying them. For example, remove any reference attributes or change the data type to a supported one.
  
  
  Adjust Field Lengths: Ensure that the lengths of the fields are appropriate. For example, CHAR fields should have a length that is within the acceptable range.
  
  
  Recreate the Structure: If the structure is complex or has many fields, it may be easier to recreate the structure from scratch, ensuring that all fields are defined correctly.
  
  
  Check for Dependencies: If the structure is being used in other objects, check for dependencies that may be causing the issue. You may need to adjust those objects as well.
  
  
  Consult Documentation: Refer to SAP documentation or the ABAP Dictionary documentation for more information on valid data types and structure definitions.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to view and modify structures and data elements.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message.
  ABAP Development: If you are an ABAP developer, ensure that you are familiar with the data types and structures used in your development environment.
  
  By following these steps, you should be able to identify the cause of the FR660 error and implement a solution to resolve it.