Message type: E = Error
Message class: EA - IDoc Basis Messages
Message number: 309
Message text: Segment & is unknown
Segment '&v1&' is unknown.
The information is not available.
Please check the name of the requested segment.
Error message extract from SAP system. Copyright SAP SE.
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EA308 Description for IDoc basic type & not found
What causes this issue? The description of IDoc basic type '&v1&...
EA307 IDoc type & is unknown in Release &
What causes this issue? IDoc type '&v1&' is unknown in Releas...
EA310 Structure of segment &1 is unknown (field name &2)
What causes this issue? The system cannot fully check the structure of segment ...
EA311 Segment & is inconsistent
What causes this issue? The definition of segment '&v1&' is o...
SAP messages fall into 3 different categories: Error messages
(message type = E), Warnings (W) or Informational (I) messages.
An error message will prevent you from continuing your work - it is a hard stop and you need to fix the error before you can proceed. A warning message will stop your work, however, you can then bypass the warning by pressing the Enter key on your keyboard. That said, it is still good practice to investigate the cause of the warning message and address it. An information message will not stop your work and is truly just for informational purposes.
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