How To Fix FL383 - With RFC modules, no generic types are allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 383

• Message text: With RFC modules, no generic types are allowed

What causes this issue?

You attempted to assign a generic type to a parameter of a remotely
called function module. This is not supported.

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?

You must assign either a reference field or a reference structure to
each function parameter.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL383 - With RFC modules, no generic types are allowed ?

  The SAP error message FL383 ("With RFC modules, no generic types are allowed") typically occurs when you are trying to use a generic data type in a Remote Function Call (RFC) module. RFC modules have specific requirements regarding data types, and generic types are not permitted in this context.
  Cause:
  The error arises when:
  
  You define a parameter in an RFC-enabled function module with a generic type (like ANY, TABLE, or STRING).
  The RFC interface cannot handle these generic types because they do not have a specific structure or format that can be serialized and transmitted over the network.
  
  Solution:
  To resolve this error, you should:
  
  
  Change Generic Types to Specific Types: Review the parameters of your RFC-enabled function module and replace any generic types with specific types. For example:
  
  Instead of using STRING, use CHAR or VARCHAR with a defined length.
  Instead of using TABLE, define a specific structure for the table.
  
  
  
  Define Structures: If you need to pass complex data, define a specific structure in the ABAP Dictionary (SE11) and use that structure in your RFC function module.
  
  
  Check Function Module Definition: Ensure that all parameters in the function module are defined with concrete data types. You can do this by going to the function module in transaction SE37 or SE80 and reviewing the parameter definitions.
  
  
  Test the Changes: After making the necessary changes, activate the function module and test it to ensure that the error is resolved.
  
  
  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.
  Data Types in ABAP: Understanding the various data types in ABAP is crucial for defining function modules correctly. Common types include CHAR, NUMC, DATS, TIMS, and user-defined structures.
  Function Module Attributes: When creating or modifying function modules, pay attention to the attributes that define whether a function module is RFC-enabled.
  
  By ensuring that all parameters in your RFC function module are defined with specific data types, you can avoid the FL383 error and ensure proper communication between systems.