diff --git a/packages/components-front/package.json b/packages/components-front/package.json
index 810f642f7..b0a3d76bf 100644
--- a/packages/components-front/package.json
+++ b/packages/components-front/package.json
@@ -40,6 +40,7 @@
   "devDependencies": {
     "@thatopen/fragments": "2.0.0-alpha.4",
     "@thatopen/ui": "2.0.0-alpha.5",
+    "@thatopen/ui-obc": "2.0.0-alpha.5",
     "@types/earcut": "^2.1.4",
     "@types/three": "^0.160.0",
     "three": "^0.160.1",
diff --git a/packages/components-front/src/fragments/FragmentIfcStreamer/src/fragment-stream-loader.ts b/packages/components-front/src/fragments/FragmentIfcStreamer/src/fragment-stream-loader.ts
index 69a28c690..25a1c2aad 100644
--- a/packages/components-front/src/fragments/FragmentIfcStreamer/src/fragment-stream-loader.ts
+++ b/packages/components-front/src/fragments/FragmentIfcStreamer/src/fragment-stream-loader.ts
@@ -242,7 +242,7 @@ export class FragmentStreamLoader
       const fetched = await fetch(this.url + indexesFile);
       const rels = await fetched.text();
       const indexer = this.components.get(OBC.IfcRelationsIndexer);
-      indexer.getRelationsMapFromJSON(rels);
+      indexer.relationMaps[group.uuid] = indexer.getRelationsMapFromJSON(rels);
     }
 
     this.culler.needsUpdate = true;
diff --git a/yarn.lock b/yarn.lock
index e297cae69..8bc190621 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1294,6 +1294,7 @@ __metadata:
     "@thatopen/components": 2.0.0-alpha.8
     "@thatopen/fragments": 2.0.0-alpha.4
     "@thatopen/ui": 2.0.0-alpha.5
+    "@thatopen/ui-obc": 2.0.0-alpha.5
     "@types/earcut": ^2.1.4
     "@types/three": ^0.160.0
     camera-controls: 2.7.3
@@ -1358,6 +1359,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@thatopen/ui-obc@npm:2.0.0-alpha.5":
+  version: 2.0.0-alpha.5
+  resolution: "@thatopen/ui-obc@npm:2.0.0-alpha.5"
+  dependencies:
+    "@thatopen/ui": 2.0.0-alpha.5
+  peerDependencies:
+    "@thatopen/components": 2.0.0-alpha.7
+    three: 0.160.1
+  checksum: 8fa3bc052705e53c096cfc438d9fb9fec8b744db6c22d2fb8ee1483b7dd65e3451db887704535aff06f64c89b06919313ee3a051da3a089df8902479db7a63eb
+  languageName: node
+  linkType: hard
+
 "@thatopen/ui@npm:2.0.0-alpha.5":
   version: 2.0.0-alpha.5
   resolution: "@thatopen/ui@npm:2.0.0-alpha.5"