How To Fix RSDS055 - Extractor &1 cannot be called synchronously

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDS - New DataSource

• Message number: 055

• Message text: Extractor &1 cannot be called synchronously

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDS055 - Extractor &1 cannot be called synchronously ?

  The SAP error message RSDS055 indicates that a specific extractor (denoted by &1) cannot be called synchronously. This typically occurs in the context of data extraction processes, particularly when using SAP BW (Business Warehouse) or SAP HANA.
  Cause:
  The error can arise due to several reasons:
  
  Extractor Configuration: The extractor may not be configured to support synchronous calls. Some extractors are designed to work asynchronously due to the nature of the data they handle or the volume of data being processed.
  Data Volume: If the extractor is expected to handle a large volume of data, it may be set up to run asynchronously to avoid performance issues.
  System Settings: There may be system settings or restrictions that prevent the extractor from being called synchronously.
  Data Source Type: The type of data source (e.g., ODP, OLE DB, etc.) may not support synchronous extraction.
  
  Solution:
  To resolve the RSDS055 error, consider the following steps:
  
  
  Check Extractor Configuration:
  
  Review the configuration of the extractor in the DataSource settings. Ensure that it is set up correctly for the intended use case.
  If the extractor is not meant to be called synchronously, you may need to adjust your data flow or process to accommodate asynchronous extraction.
  
  
  
  Use Asynchronous Extraction:
  
  If the extractor is designed for asynchronous processing, modify your data extraction process to use the appropriate asynchronous method. This may involve using a different function module or API that supports asynchronous calls.
  
  
  
  Review System Settings:
  
  Check the system settings related to data extraction and ensure that there are no restrictions preventing synchronous calls.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific extractor to understand its capabilities and limitations. This can provide insights into whether synchronous extraction is supported.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot determine the cause, consider reaching out to SAP support for assistance. They can provide guidance based on the specific extractor and system configuration.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide updates related to the extractor in question.
  Transaction Codes: Familiarize yourself with transaction codes like RSA1 (Data Warehousing Workbench) and RSO2 (DataSource Maintenance) for managing data sources and extractors.
  Performance Considerations: Understand the performance implications of synchronous vs. asynchronous extraction, especially in high-volume scenarios.
  
  By following these steps, you should be able to diagnose and resolve the RSDS055 error effectively.