How To Fix IUUC_TAB199 - Unknown datatype &1 in field &2 of remote table &3 (RFC '&4')

SAP Error Message - Details

• Message type: E = Error

• Message class: IUUC_TAB - IUUC: Messages for table analysis

• Message number: 199

• Message text: Unknown datatype &1 in field &2 of remote table &3 (RFC '&4')

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_TAB199 - Unknown datatype &1 in field &2 of remote table &3 (RFC '&4') ?

  The SAP error message IUUC_TAB199 indicates that there is an issue with a data type in a remote table during a Remote Function Call (RFC). This error typically arises in the context of SAP Landscape Transformation (SLT) or when using SAP Data Services, where data is being replicated or transformed between systems.
  Cause:
  The error message "Unknown datatype &1 in field &2 of remote table &3 (RFC '&4')" suggests that the system encountered a data type that it does not recognize or support. This can happen due to several reasons:
  
  
  Incompatible Data Types: The source system (where the data is coming from) has a data type that is not recognized by the target system (where the data is being sent). This can occur if the source and target systems are on different versions of SAP or if custom data types are used.
  
  
  Missing Data Type Definitions: The target system may not have the necessary definitions for certain data types that exist in the source system.
  
  
  Configuration Issues: There may be configuration issues in the SLT or data replication settings that lead to this error.
  
  
  Changes in Data Model: If the data model in the source system has changed (e.g., new fields added with unsupported data types), it can lead to this error.
  
  
  Solution:
  To resolve the IUUC_TAB199 error, you can take the following steps:
  
  
  Check Data Types: Review the data types of the fields in the source table and compare them with the target table. Ensure that all data types are compatible.
  
  
  Update Data Type Definitions: If the target system is missing definitions for certain data types, you may need to update or create the necessary data type definitions in the target system.
  
  
  Adjust SLT Configuration: Review the SLT configuration settings to ensure that they are correctly set up to handle the data types being used. This may involve adjusting the mapping or transformation rules.
  
  
  Check for Custom Data Types: If custom data types are being used, ensure that they are defined in both the source and target systems. You may need to create or adjust these custom types.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide guidance on handling data type issues.
  
  
  Test with Sample Data: If possible, test the replication with a smaller dataset to isolate the issue and identify which specific field or data type is causing the problem.
  
  
  Contact SAP Support: If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance.
  
  
  Related Information:
  
  SAP SLT Documentation: Review the official SAP documentation for Landscape Transformation to understand how data types are handled and any limitations that may exist.
  Data Dictionary (SE11): Use transaction SE11 to check the definitions of the data types in both the source and target systems.
  RFC Function Modules: Investigate the RFC function modules being called to see if there are any known issues or updates related to data type handling.
  
  By following these steps, you should be able to identify and resolve the cause of the IUUC_TAB199 error in your SAP environment.