diff --git a/src/controllers/PositionController.ts b/src/controllers/PositionController.ts
index c2facbd4..3a42acce 100644
--- a/src/controllers/PositionController.ts
+++ b/src/controllers/PositionController.ts
@@ -2003,7 +2003,7 @@ export class PositionController extends Controller {
           posMaster.orgChild3Id == null
         ) {
           body.type = 0;
-          shortName = posMaster.orgRoot.orgRootShortName;
+          shortName = posMaster.orgRoot?.orgRootShortName;
         } else if (
           posMaster.orgRootId !== null &&
           posMaster.orgChild1Id !== null &&
@@ -2011,7 +2011,7 @@ export class PositionController extends Controller {
           posMaster.orgChild3Id == null
         ) {
           body.type = 1;
-          shortName = posMaster.orgChild1.orgChild1ShortName;
+          shortName = posMaster.orgChild1?.orgChild1ShortName;
         } else if (
           posMaster.orgRootId !== null &&
           posMaster.orgChild1Id !== null &&
@@ -2019,7 +2019,7 @@ export class PositionController extends Controller {
           posMaster.orgChild3Id == null
         ) {
           body.type = 2;
-          shortName = posMaster.orgChild2.orgChild2ShortName;
+          shortName = posMaster.orgChild2?.orgChild2ShortName;
         } else if (
           posMaster.orgRootId !== null &&
           posMaster.orgChild1Id !== null &&
@@ -2027,7 +2027,7 @@ export class PositionController extends Controller {
           posMaster.orgChild3Id !== null
         ) {
           body.type = 3;
-          shortName = posMaster.orgChild3.orgChild3ShortName;
+          shortName = posMaster.orgChild3?.orgChild3ShortName;
         } else if (
           posMaster.orgRootId !== null &&
           posMaster.orgChild1Id !== null &&
@@ -2035,7 +2035,7 @@ export class PositionController extends Controller {
           posMaster.orgChild3Id !== null
         ) {
           body.type = 4;
-          shortName = posMaster.orgChild4.orgChild4ShortName;
+          shortName = posMaster.orgChild4?.orgChild4ShortName;
         }
 
         return {