How To Fix STEP551 - &1 &2 has an unexpected type &3 (&4 was expected)

SAP Error Message - Details

• Message type: E = Error

• Message class: STEP - ISO 10303 STEP Mapping Messages

• Message number: 551

• Message text: &1 &2 has an unexpected type &3 (&4 was expected)

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?

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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 STEP551 - &1 &2 has an unexpected type &3 (&4 was expected) ?

  The SAP error message "STEP551 &1 &2 has an unexpected type &3 (&4 was expected)" typically indicates a type mismatch in a workflow or process step within an SAP system. This error can occur in various contexts, such as during the execution of a workflow, a batch job, or a program that processes data.
  Cause:
  
  Type Mismatch: The error suggests that the system encountered a data type that it did not expect. For example, it might be expecting a certain type of data (like a string, integer, or date) but received a different type.
  Incorrect Configuration: The workflow or process might be incorrectly configured, leading to the system trying to process data in an unexpected format.
  Data Corruption: There could be issues with the data being processed, such as corruption or incorrect data entry.
  Custom Code Issues: If there are custom developments or enhancements in the workflow, they might not be handling data types correctly.
  
  Solution:
  
  Check Workflow Configuration: Review the configuration of the workflow or process step to ensure that all data types are correctly defined and match the expected types.
  Debugging: Use the debugging tools in SAP to trace the execution of the workflow or program. This can help identify where the type mismatch is occurring.
  Data Validation: Validate the data being processed to ensure it conforms to the expected types. This may involve checking database entries or input parameters.
  Review Custom Code: If there are custom developments, review the code to ensure that it correctly handles data types and conversions.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide guidance on similar issues.
  Consult Documentation: Refer to the official SAP documentation for the specific module or process you are working with to understand the expected data types and configurations.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE80 (Object Navigator) or SE37 (Function Module) to investigate the relevant objects and code.
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered similar issues.
  System Logs: Check the system logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to involve your SAP Basis or development team for further investigation.