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

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 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