How To Fix WS637 - &1: Missing reference to currency field/unit field

WS637 - Overview

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 637

• Message text: &1: Missing reference to currency field/unit field

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.

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WS637 - Details

• Certainly! Here's a detailed explanation of the SAP error message:
  
  SAP Error Message:
  WS637 &1: Missing reference to currency field/unit field
  
  
  Cause:
  This error occurs when a currency or quantity field in a structure or table is defined without specifying the corresponding reference field for currency or unit of measure. In SAP, fields that represent amounts or quantities must be linked to their respective currency or unit fields to ensure correct interpretation and processing.
  
  For currency fields (type CURR), SAP requires a reference to a currency key field (type WAERS).
  For quantity fields (type QUAN), SAP requires a reference to a unit of measure field (type UNIT).
  
  If this reference is missing or incorrectly defined, the system raises the WS637 error.
  
  When does it occur?
  
  During data dictionary (DDIC) object creation or modification (e.g., tables, structures, views).
  When defining fields of type CURR or QUAN without specifying the currency or unit reference fields.
  When generating or activating dictionary objects.
  Sometimes during runtime