How To Fix M2757 - IDoc segment & is interpreted as a communication structure!

M2757 - Overview

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 757

• Message text: IDoc segment & is interpreted as a communication structure!

What causes this issue?

The creation of an LIS inbound interface is dependent on a
communication structure. This communication structure needs to satisfy
particular requirements. It must contain a field of type DATS, for
example.
The IDoc consists of the following structures:

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<ZH>Inbound structure</>
Please observe the naming convention E1, ...!
The inbound structure is the structure to which the data flows. It only
consists of fields of the type CHARACTER.
<ZH>Check structure ALE</>
Please observe naming convention E2, ...!
You can ignore the check structure in this case.
<ZH>Documentation structure / outbound structure</>
Please observe naming convention E3, ...!
The outbound structure is the structure to which the entered data is
transferred. This is where conversion takes place (number fields of
the type CHARACTER from the inbound structure become number fields of
the type NUMERIC, for example).
The outbound structure is then transferred to the corresponding
application for further processing. This structure then corresponds to
the SAP definition of a communication structure.

Error message extract from SAP system. Copyright SAP SE.

M2757 - Details

• The SAP error message M2757 typically indicates an issue with the IDoc (Intermediate Document) processing, specifically related to the structure of the IDoc segments. The message suggests that the IDoc segment is being interpreted incorrectly, which can lead to communication issues between systems.
  
  Cause:
  
  Incorrect IDoc Structure: The IDoc segment may not conform to the expected structure defined in the IDoc type. This can happen if the IDoc is generated with missing or incorrect fields.
  Mapping Issues: If you are using a middleware or an interface to map data to the IDoc, there may be a mapping error that causes the segment to be misinterpreted.
  Version Mismatch: There may be a version mismatch between the sender and receiver systems regarding the IDoc type or structure.
  
  Configuration Issues: Incorrect configuration in the IDoc processing settings or partner profiles can lead to this error.
  
  
  Solution:
  
  Check IDoc Structure: Verify that the IDoc being sent conforms to the expected structure.