303 SAP Message of Class IW No reference object selected

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303(IW) - No reference object selected

Message number 303 of class IW is used to display message "No reference object selected" and can be triggered using the following ABAP code:

    MESSAGE W303(IW). "Warning message example
    MESSAGE I303(IW). "Information message example
    MESSAGE E303(IW). "Error message example
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What causes this issue

You requested the selection of an assembly by means of
the structure list or structure graphic, but did not select an assembly.

System Response

The system did not change the original assembly in the operation.

How to fix

Message text extract from SAP system. Copyright SAP SE.

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