How To Fix S_CUS_IMG_ACTIVITY090 - Table/View &1: Field '&2' of data type String is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: S_CUS_IMG_ACTIVITY - IMG Activity

• Message number: 090

• Message text: Table/View &1: Field '&2' of data type String is not supported

What causes this issue?

The data part of table/view &V1& contains a field of type 'STRING'. You
cannot put such objects in BC Sets because of their length.

System Response

The table/view is not forbidden in BC Sets, but the field is not
proposed for the BC Set in the BC Set maintenance transaction (SCPR3).

How to fix this error?

This is not a table/view design error. Such a field cannot be put in BC
Sets because of the current BC Set design. The SAP developer resposible
for the table/view can:
If it does not cost too much effort, adjust the table/view in the
Dictionary so that it contains no fields of type 'STRING'. You may have
to regenerate any maintenance dialog (SE54).
This change will usually require a lot of effort. You can confirm the BC
Set compatibility check restriction. <ZH>This does <ZU>not</> deactivate
the BC Set functionality for this object. The field of type 'STRING'
cannot be used in BC Sets</>.
<ZH>Note</>:
Test the BC Set functionality to ensure that the entries are correct.
Create a BC Set for the object.
Check whether the data has been completely recorded in the BC Set
(SCPR3).
Change an entry in the object (SPRO or SM30/34).
Activate the BC Set (SCPR20).
Check whether the values in the BC Set have been written correctly into
the table/view.

Error message extract from SAP system. Copyright SAP SE.