PNF service instantiation using building blocks fails during ActivateServiceInstanceBB building block execution

2020-10-21T11:07:59.731Z|b1bbb4b0-ee2d-4109-844e-8032b0af9061|o.o.l.filter.spring.SpringClientPayloadFilter - ============================response begin==========================================
2020-10-21T11:07:59.732Z|b1bbb4b0-ee2d-4109-844e-8032b0af9061|o.o.l.filter.spring.SpringClientPayloadFilter - Status code  : 200 OK
2020-10-21T11:07:59.732Z|b1bbb4b0-ee2d-4109-844e-8032b0af9061|o.o.l.filter.spring.SpringClientPayloadFilter - Status text  :
2020-10-21T11:07:59.732Z|b1bbb4b0-ee2d-4109-844e-8032b0af9061|o.o.l.filter.spring.SpringClientPayloadFilter - Headers      : [Location:"http://so-request-db-adapter.onap:8083/infraActiveRequests/b1bbb4b0-
ee2d-4109-844e-8032b0af9061", X-Content-Type-Options:"nosniff", X-XSS-Protection:"1; mode=block", Cache-Control:"no-cache, no-store, max-age=0, must-revalidate", Pragma:"no-cache", Expires:"0", X-Frame-Op
tions:"DENY", Content-Type:"application/json;charset=UTF-8", Transfer-Encoding:"chunked", Date:"Wed, 21 Oct 2020 11:07:59 GMT"]
2020-10-21T11:07:59.733Z|b1bbb4b0-ee2d-4109-844e-8032b0af9061|o.o.l.filter.spring.SpringClientPayloadFilter - Response body: {
  "requestId" : "b1bbb4b0-ee2d-4109-844e-8032b0af9061",
  "requestStatus" : "FAILED",
  "statusMessage" : "Runtime error : Error while evaluating expression: ${WorkflowActionBBTasks.selectBB(execution)}. Cause: java.lang.IndexOutOfBoundsException: Index 6 out of bounds for length 6",
  "flowStatus" : "ActivateServiceInstanceBB has failed.",
  "progress" : 100,
  "startTime" : "2020-10-21T11:07:12.000+0000",
  "endTime" : "2020-10-21T11:07:59.593+0000",
  "source" : "VID",