SAP Message /SAPCND/DD_CUSTOMIZE024 - Enter a name for the det. procedure in accordance with customer namespace

Diagnosis
The name of the procedure that you have chosen for data determinationis not in the name space that you have reserved for customers.

System Response
The data cannot be processed!

Procedure
Change the name accordingly for the customer reserved namespace.
All names are permitted in the customer namespace that begin with thefigures 8 or 9 or with the letters 'A' to 'Z'.