SAP Message WL429 - Workflow '&' container operation step &: Numeric value & or & too large

Diagnosis
The required operation on two variables in the workflow containercannot be executed since the variable values or the result are largerthan the largest number representable in ABAP.
(Currently: 1,000,000,000 or 1 E 9)
INCLUDE NA_WF_ERROR OBJECT DOKU ID TX

Procedure
Check the container elements of the workflow container and the relatedactivities which assign values to these container elements. You mayneed to use a task (method) that implements the required arithmeticoperation with floating-point arithmetic.