How To Fix FPAPICHK055 - Field & is not of type STRING or XSTRING

SAP Error Message - Details

• Message type: E = Error

• Message class: FPAPICHK - SAFPAPI Message Class (Check)

• Message number: 055

• Message text: Field & is not of type STRING or XSTRING

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FPAPICHK055 - Field & is not of type STRING or XSTRING ?

  The SAP error message FPAPICHK055 indicates that a field in your program or function module is expected to be of type STRING or XSTRING, but it is not. This error typically arises in the context of data processing, especially when dealing with APIs or function modules that require specific data types.
  Cause:
  
  Incorrect Data Type: The field being passed to a function or method is of a different data type (e.g., CHAR, NUMC, etc.) instead of STRING or XSTRING.
  Data Structure Mismatch: If you are using a structure or table that has fields defined with incompatible types, this error can occur.
  API Requirements: The API or function module you are calling may have strict requirements for the data types of the parameters being passed.
  
  Solution:
  
  Check Data Types: Review the data types of the fields being passed to the function or method. Ensure that they are defined as STRING or XSTRING.
  Convert Data Types: If the field is not of the required type, you can convert it. For example:
  
  To convert a CHAR or NUMC field to STRING, you can use the CONCATENATE statement or simply assign it directly if the length is appropriate.
  For XSTRING, you may need to use functions like SCMS_STRING_TO_XSTRING to convert a STRING to XSTRING.
  
  
  Modify Data Structures: If you are using a custom structure or table, ensure that the fields are defined with the correct types.
  Review Documentation: Check the documentation for the function module or API you are using to ensure you are passing the correct types.
  
  Related Information:
  
  Data Type Definitions: In ABAP, STRING is a variable-length character string, while XSTRING is a variable-length binary string.
  Function Modules: If you are using a specific function module, refer to its interface definition in the SAP system to understand the expected data types.
  Debugging: Use the debugger to inspect the values and types of the variables at runtime to identify where the mismatch occurs.
  
  By following these steps, you should be able to resolve the FPAPICHK055 error and ensure that the data types being used are compatible with the requirements of the function or API you are working with.