How To Fix BE027 - External number assignment not available

BE027 - Overview

• Message type: E = Error

• Message class: BE - General document entry

• Message number: 027

• Message text: External number assignment not available

What causes this issue?

You have tried to specify a document number when creating a funds
reservation.
The SAP system produces a numbered document for each posting. Changes
are documented and thus clearly identifiable.
Prerequisites:
the number range object exists
one or more number range intervals have been created, and
you have thus determined whether document numbers are allocated
by the system (internal number allocation), or
by the user (external number allocation)
You have entered a document number
for which there is no interval, or
which falls into an interval provided for internal number allocation.

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

Delete your input and access the relevant entry screen. When you
save the document, the system allocates a number to it.

Error message extract from SAP system. Copyright SAP SE.

BE027 - Details

• The SAP error message BE027, which states "External number assignment not available," typically occurs when there is an issue with the number range configuration for a specific document type or object in the SAP system. This error is often encountered when trying to create or process documents that require an external number assignment, but the system is unable to find a valid number range.
  Causes:
  
  Number Range Configuration: The external number range for the document type you are trying to use has not been defined or is not active.
  Number Range Status: The number range may be exhausted, meaning that all available numbers have been used up.
  Document Type Settings: The document type may not be configured to allow external number assignment.
  Authorization Issues: The user may not have the necessary authorizations to access the number range.
  Client-Specific Settings: The number range may be defined in a different client or not properly transported to the current