Hi José
Maybe its too late but i wanna share my solution for others
I had the same issue but i solve the problem by adding modified org/jbpm/task/service/operations-dsl.mvel file to the classpath
You can change the operation requirements with this file
Operation.Claim
: [ new OperationCommand().{
status = [ Status.Ready,Status.Reserved ],
allowed = [Allowed.Anyone, Allowed.PotentialOwner, Allowed.BusinessAdministrator ],
setNewOwnerToUser = true,
newStatus = Status.Reserved
} ],
this solved my problem
In an other way you can extend TaskService by changing the Map<Operation, List<OperationCommand>> operations field and use this with the TaskServer implementations
regards