diff --git a/carlog/carlog.go b/carlog/carlog.go
index e7984a8..e36b9dd 100644
--- a/carlog/carlog.go
+++ b/carlog/carlog.go
@@ -1393,7 +1393,17 @@ func (j *CarLog) genTopCar() error {
 	}
 
 	if j.dataEnd != 0 {
-		return xerrors.Errorf("cannot generate top car - already generated")
+		if len(j.layerOffsets) != 0 {
+			return xerrors.Errorf("cannot generate top car - already generated, have layers")
+		}
+		if j.dataLen != j.dataEnd {
+			return xerrors.Errorf("cannot generate top car - data length mismatch")
+		}
+		if j.dataPos.pos != j.dataEnd {
+			return xerrors.Errorf("cannot generate top car - data position mismatch")
+		}
+
+		log.Errorw("resuming top car generation", "dataLen", j.dataLen, "dataEnd", j.dataEnd, "dataPos", j.dataPos.pos, "dataStart", j.dataStart, "dataPath", j.DataPath, "indexPath", j.IndexPath)
 	}
 	j.dataEnd = j.dataLen
 
diff --git a/rbstor/group_worker.go b/rbstor/group_worker.go
index cfedf36..01bb572 100644
--- a/rbstor/group_worker.go
+++ b/rbstor/group_worker.go
@@ -38,11 +38,12 @@ func (r *rbs) workerExecTask(toExec task) {
 		r.lk.Unlock()
 		err := g.Finalize(context.TODO())
 		if err != nil {
-			log.Errorf("finalizing group: %s", err)
+			log.Errorw("finalizing group", "error", err, "group", toExec.group)
 		}
 
 		r.sendSub(toExec.group, iface.GroupStateFull, iface.GroupStateVRCARDone)
 
+		log.Errorw("finalize fallthrough to genCommP", "group", toExec.group)
 		fallthrough
 
 	case taskTypeGenCommP: