Message type: E = Error
Message class: EA - IDoc Basis Messages
Message number: 156
Message text: This IDoc cannot be changed
This IDoc cannot be modified.
The IDoc is either an original IDoc (copy of an IDoc before editing
took place) or an IDoc which was posted successfully in the
application.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
You can only display or print this IDoc.
Error message extract from SAP system. Copyright SAP SE.
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EA155 Direction cannot be changed when modifying control record
Self-Explanatory Message Since SAP believes that this specific error message is ...
EA154 Error while updating data records for IDoc '&'
Self-Explanatory Message Since SAP believes that this specific error message is ...
EA157 This IDoc was created using a test transaction
What causes this issue? The IDoc is not used productively, but rather has been ...
EA158 This IDoc data record cannot be edited - field is too long
Self-Explanatory Message Since SAP believes that this specific error message is ...
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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