How To Fix SF640 - Link type table has not been maintained

SF640 - Overview

• Message type: E = Error

• Message class: SF - SAPfind: Message Texts

• Message number: 640

• Message text: Link type table has not been maintained

What causes this issue?

The tables listing possible link types (DSYLI and DSYLT) do not contain
any entries.

System Response

Execution of the program stops.

How to fix this error?

Using SM31 add the following entries:
to table DSYLI:
E
I
O
R
T
to table DSYLT:
Language,,L,,Link type ID
D,,E,,Executable link
D,,I,,Insertable link
D,,O,,Link from a structure
D,,R,,Referential link
D,,T,,Link to a structure
Then repeat the function.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SF640 - Link type table has not been maintained ?

  The SAP error message SF640, which states "Link type table has not been maintained," typically occurs in the context of SAP SuccessFactors or SAP HCM (Human Capital Management) when there is an issue with the configuration of link types in the system. This error indicates that the system is unable to find the necessary link type configuration for a specific operation or process.
  
  Cause:
  
  Missing Configuration: The link type table that defines the relationships between different entities (like employees, positions, etc.) has not been set up or maintained properly.
  Incorrect Settings: There may be incorrect or incomplete settings in the link type configuration that prevent the system from processing requests.
  Data Migration Issues: If data has been migrated from another system, the link types may not have been correctly transferred or configured.
  
  
  Solution:
  
  
  Maintain Link Type Table:
  
  Navigate to the relevant configuration area in SAP where link types are defined. This is usually found in the customizing