Take a look at the Sprinter user guide and search for Business Process Testing Limitations.
It lists the issue you describe, along with some possible situational causes.
- Your business process test has an
input parameter linked to an output
parameter, but the number of
iterations for the components that
contain the input and output
parameters do not match.
- You created an output parameter for a
flow but it is not linked to an
existing parameter in a component.
Note that Sprinter will not display an error message for the test in this case.
Check to see if the above matches your situation.