1) All 12 review are sequential2) 12 is variable, value from config file. We can change any no in config and initiate workflow3) I tried with UserTask that's working fine, even 7 ReviewTask with users as reviewer working fine. But 7 review task with group as reviewer is not working, even any one has group rest has user also giving issue.4) I tried the senario what you mentioned, that gives issue without any issue.I'm using WorkflowModeler 1.0.1.0, will that give any issue. Can anyone tell what's the latest modeler version.