Diagnosis
You want to enter your own values for variable &V1& . However, this isnot allowed for this variable. The reason is that in the variabledefinition of variable &V1&, the indicator 'Input allowed by user' isnot set.

Procedure
Only enter additional values for variables with the replacement type'user-specific values', for which adding your own values is allowed. Tofind out which variables fill these conditions, choose Definefilter criteria and set the filter criteria 'User entry allowed'.