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

IUUC_TAB199 - Overview

• 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