How To Fix RSDS185 - Delta field &1 must have type "DATS" for delta method "Date"

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDS - New DataSource

• Message number: 185

• Message text: Delta field &1 must have type "DATS" for delta method "Date"

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDS185 - Delta field &1 must have type "DATS" for delta method "Date" ?

  The SAP error message RSDS185 indicates that there is an issue with the delta field configuration in your DataSource. Specifically, it states that the delta field must have the data type "DATS" (which represents a date type in SAP) when using the delta method "Date." 
  Cause:
  This error typically occurs when:
  
  The delta field defined in the DataSource is not of the correct data type. For the delta method "Date," the field must be of type "DATS."
  There may be a mismatch between the field definition in the source system and the DataSource definition in SAP BW.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check DataSource Definition:
  
  Go to the DataSource in the SAP BW system (transaction code RSA1).
  Navigate to the DataSource and check the field definitions.
  Ensure that the delta field you are using for the delta method "Date" is defined with the data type "DATS."
  
  
  
  Modify the DataSource:
  
  If the delta field is not of type "DATS," you will need to modify the DataSource.
  You can do this by creating a new DataSource or modifying the existing one to ensure that the delta field is correctly defined.
  
  
  
  Re-activate the DataSource:
  
  After making changes to the DataSource, make sure to re-activate it.
  This can be done in the DataSource maintenance screen.
  
  
  
  Check Source System:
  
  If the DataSource is based on a source system (like an SAP ERP system), check the field definition in the source system to ensure it is also defined as "DATS."
  
  
  
  Test the DataSource:
  
  After making the necessary changes, test the DataSource to ensure that the error is resolved and that data can be extracted correctly.
  
  
  
  Related Information:
  
  Delta Methods in SAP BW: Delta methods are used to determine how data is extracted from the source system. The "Date" delta method is used to extract data based on a date field, which is why the field must be of type "DATS."
  Data Types in SAP: Understanding the different data types in SAP (like CHAR, NUMC, DATS, etc.) is crucial for configuring DataSources correctly.
  SAP Notes: Check for any relevant SAP Notes that might provide additional guidance or updates related to this error message.
  
  By following these steps, you should be able to resolve the RSDS185 error and ensure that your DataSource is configured correctly for delta extraction.