2327069 - Runtime Error ASSIGN_BASE_TOO_SHORT in program RSTBHIST or transaction SCU3

Runtime Error ASSIGN_BASE_TOO_SHORT is raised in program RSTBHIST or transaction SCU3 or report RSVTPROT

This KBA applies to all SAP Products based on NetWeaver or S4H.

RSVTPROT Category               ABAP programming error
Runtime Errors         ASSIGN_BASE_TOO_SHORT
ABAP Program           RSVTPROT
Application Component  BC-CUS-TOL-ALO
Date and Time          28.11.2018 08:39:57    Short Text
     Error in ASSIGN assignment in program "RSVTPROT".    What happened?
     Error in the ABAP application program.      The current ABAP program "RSVTPROT" had to be terminated because it found a
     statement that could not be executed.    What can I do?
     Note which actions and entries caused the error to occur.      Consult your SAP administrator.      Using transaction ST22 for ABAP dump analysis, you can view, manage,
     and retain termination messages for longer periods.
     Using Transaction ST22 for ABAP Dump Analysis, you can look
     at and manage termination messages, and you can also
     keep them for a long time.    Error analysis
     The source field is too short.
     In the current program "RSVTPROT", an attempt was made to assign a field to
     field symbol where the field is shorter than the type of the field
     symbol. This is not supported.
     It is a statement of form ASSIGN f TO <fs> CASTING... or ASSIGN f TO
     <fs> with a field symbol that was created with the STRUCTURE addition.    How to correct the error
     The source field must at least be as long as the structure.      If the error occurs in a non-modfied SAP program, you might be able to
     find a solution in the SAP Notes system. If you have access to the SAP
     Notes system, check there first using the following keywords:      "ASSIGN_BASE_TOO_SHORT"
     "RSVTPROT" bzw. RSVTPF05
     "CONVERT_LOGS"
     If you cannot solve the problem yourself, please send the following
     information to SAP: , KBA , BC-CUS-TOL-ALO , Activity Log , BC-CUS-TOL-TME , View Maintenance Tool , Problem