How To Fix FL388 - Only standard tables are permitted in RFC

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 388

• Message text: Only standard tables are permitted in RFC

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FL388 - Only standard tables are permitted in RFC ?

  The SAP error message FL388 ("Only standard tables are permitted in RFC") typically occurs when you are trying to use a non-standard table in a Remote Function Call (RFC) context. This error is common when working with RFC-enabled function modules that are expected to interact with standard SAP tables.
  Cause:
  
  Non-Standard Tables: The primary cause of this error is the use of custom or non-standard tables in the parameters of an RFC-enabled function module. SAP restricts the use of non-standard tables in RFC calls to ensure data integrity and compatibility.
  Table Type: If you are trying to pass a table type that is not recognized as a standard SAP table, this error will be triggered.
  Function Module Definition: The function module may be incorrectly defined, or the parameters may not be set up to handle non-standard tables.
  
  Solution:
  
  Use Standard Tables: Ensure that you are using only standard SAP tables in your RFC-enabled function module. If you need to work with custom data, consider using standard tables to hold the data temporarily or convert your custom data into a format that can be passed as a standard table.
  Modify Function Module: If you have control over the function module, you may need to modify it to accept standard table types or to handle the data differently.
  Create Wrapper Function: If you need to work with non-standard tables, consider creating a wrapper function that converts the data from your custom table into a standard format before passing it to the RFC-enabled function.
  Check Table Definitions: Review the definitions of the tables you are using to ensure they are correctly defined and recognized by the system.
  
  Related Information:
  
  RFC (Remote Function Call): A protocol used in SAP to enable communication between different SAP systems or between SAP and non-SAP systems.
  Standard Tables: Tables that are part of the SAP standard data model, which are predefined and recognized by the SAP system.
  Function Module: A reusable piece of code in SAP that can be called from other programs or function modules, often used for encapsulating business logic.
  
  Additional Tips:
  
  Debugging: Use transaction codes like SE37 (Function Module) to check the definition of the function module and its parameters.
  Documentation: Refer to SAP documentation or community forums for specific examples and best practices related to RFC and function modules.
  Testing: Test your changes in a development environment before moving to production to ensure that the solution works as expected.
  
  By following these guidelines, you should be able to resolve the FL388 error and successfully work with RFC-enabled function modules in SAP.