How To Fix WFCS109 - Invalid aggregation mode

WFCS109 - Overview

• Message type: E = Error

• Message class: WFCS - Message Class for Store Forecasting (Dev. Package WFCS)

• Message number: 109

• Message text: Invalid aggregation mode

What causes this issue?

During the replenishment run, the system attempted to read the forecast
data in aggregated form. When doing this, the forecast results can be
read in varying degrees. The system reads the forecast data from the
database within the time interval given by replenishment, which is
calculated from the replenishment lead time and replenishment horizon,
subsequently known as a time interval. The forecast data is then
transferred to replenishment in aggregated form as forecast
requirements. Aggregation can take place in varying degrees of detail:
Aggregation of the whole period: the system aggregates and reads all
forecast values for a forecast period that fall within the time
interval. The forecast values for a forecast period that are cut off by
the beginning or the end of the time interval are included entirely in
the forecast requirements.
Proportional aggregation of the outlying forecast periods and complete
aggregation of the whole periods within the time interval: all forecast
requirements belonging to forecast periods that lie entirely within the
time interval are added completely to the forecast requirements. The
first and last forecast periods that do not necessarily lie completely
within the time interval are added proportionately.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Example of proportional forecast requirements:
The time interval for replenishment covers five forecast periods that
are a week long. The beginning of the time interval falls on the
Thursday of the first forecast period and the end of the time interval
falls on a Wednesday. The system adds the entire forecast values for
the three middle periods to the forecast requirements. Four sevenths of
the forecast value for the first period and three sevenths for the last
period are added to the forecast requirements.

System Response

The system is unable to calculate a forecast requirement for the
replenishment.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

WFCS109 - Details

• The SAP error message WFCS109: Invalid aggregation mode typically occurs in the context of SAP Workflow or Business Rules Framework plus (BRFplus) when dealing with aggregation modes in rule sets or decision tables.
  
  Cause
  
  The error "Invalid aggregation mode" indicates that an aggregation mode specified in a workflow or BRFplus rule is not valid or not supported.
  Aggregation mode refers to how multiple results or values are combined or aggregated when a rule or workflow step returns multiple outputs.
  This can happen if:
  An incorrect or unsupported aggregation mode is configured in the rule or workflow.
  The aggregation mode is missing or incorrectly maintained in the rule set or decision table.
  There is a mismatch between the expected aggregation mode and the one provided.
  The system or component version does not support the specified aggregation mode.
  
  
  
  
  Solution
  
  
  Check Aggregation Mode Configuration:
  
  Review the workflow or BRFplus rule where the error occurs.
  Verify the aggregation mode setting in the rule or decision table.
  Ensure