diff --git a/ats/verify/simulation/wayside/memory/wayside_simulation.go b/ats/verify/simulation/wayside/memory/wayside_simulation.go
index 1ce402d..1e5b785 100644
--- a/ats/verify/simulation/wayside/memory/wayside_simulation.go
+++ b/ats/verify/simulation/wayside/memory/wayside_simulation.go
@@ -493,11 +493,11 @@ func findTurnoutIds(axleCountingMap map[string]*graphicData.AxleCounting, axleId
 func buildKmConverts(ksList []*graphicData.KilometerSystem) []*proto.KilometerConvert {
 	var kmConverts []*proto.KilometerConvert
 	for i, ks := range ksList {
-		if ks.Kilometer == 0 {
+		if ks.Kilometer == 0 || ks.CoordinateSystem == "" {
 			continue
 		}
 		for j := i + 1; j < len(ksList); j++ {
-			if ks.Kilometer == 0 {
+			if ksList[j].Kilometer == 0 || ksList[j].CoordinateSystem == "" {
 				continue
 			}
 			kmConverts = append(kmConverts, buildKmConvert(ks, ksList[j]))