Use the Maximum iterations option to specify a maximum number of iterations to be used in optimizing the design.
Unsatisfiable Constraints
1.
Select DOE > Special Purpose > Covering Array.
2.
Next to Add N Factors, type 3.
3.
From the Add Factor menu, select 3 Level.
4.
Click Continue.
5.
Select Use Disallowed Combinations Filter.
6.
From the Add Filter Factors list, select all three factors and click Add.
Completed Restrict Factor Level Combinations Panel
10.
Click Make Design.
Design and Metrics Outlines

Help created on 9/19/2017