Avoiding loops in variable substitution

IBM® Z Workload Scheduler does not let you define a variable-substitution loop. If you give variable &A the value&B and then give variable &B the value &A, a variable loop is formed. If IBM® Z Workload Scheduler detects that a variable has recurred in a variable for variable type substitution, the substitution ends in error. There are three possible loops:

• Substitution of variables by variables (described here).
• Dependency of variable A on variable B, which depends on variable A.
• A combination of both of these cases.