Diagnosis
The obligatory parameter for the document ID was not specified. Thisparameter identifies the document at run-time.

Procedure
When you call up the function module "UI_DOC_GET", enter the documentID of the document you want.
If you know the database key for the document, and you want to load thedocument directly without calling up the function module"UI_LIST_OF_DOCS_GET", you must specify the value -1 forthe obligatory parameter "I_DOC_ID".