Diagnosis
There are breakpoints active for steps that no longer exist in thecurrent workflow defintion.
This situation can occur if the workflow defintion is changed after abreakpoint is activated.

System Response
When the workflow is executed, a check is carried out to see whether theworkflow needs to stop due to the active breakpoint; however, thisbreakpoint can never actually be reached of course.

Procedure
Delete all relevant breakpoints by using the DELETE key.