SAP Message WL385 - Workflow & no. & step &: Expression '&' is not a valid task number

Diagnosis
The task for the step &V3& in the workflow definition was to bedetermined dynamically from the expression &V4&. However, thisexpression does not contain a valid task number.

System Response
The workflow was suspended in error status.

Procedure
Correct the incorrect workflow definition or workflow data and thenresume the suspended workflow execution.