Output field & on selection screen not IMPORT parameter and w/o default

What causes this issue?

The flag that it should appear as a display field in the dialog box for
restricting values is set for the specified
<DS:TX.DDDOK_SHLP_PARAMETER>parameter</> of the search help. This
display is only meaningful if the parameter has contents when the
dialog box is displayed. Since the parameter is not an IMPORT parameter
and does not have a default value, and the search help does not have a
<DS:TX.DDDOK_SHLP_EXIT>search help exit</>, this parameter cannot have
contents at the time when this dialog box is displayed in the input
help process.

System Response

INCLUDE DDDOC_CANCEL

How to fix this error?

Check if the parameter should really appear as a display field in the
dialog box for restricting values. If yes, use one of the above
mechanisms to assign it contents. Otherwise reset the flag.
INCLUDE DDDOC_SHLP_HANDLE OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.