diff --git a/brouter-routing-app/build.gradle b/brouter-routing-app/build.gradle
index 4c88be6..535bf68 100644
--- a/brouter-routing-app/build.gradle
+++ b/brouter-routing-app/build.gradle
@@ -5,7 +5,7 @@ plugins {
 }
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 31
 
     defaultConfig {
         applicationId "btools.routingapp"
@@ -93,9 +93,8 @@ android {
 }
 
 dependencies {
-
-    implementation 'androidx.appcompat:appcompat:1.3.1'
-    implementation "androidx.constraintlayout:constraintlayout:2.1.2"
+    implementation 'androidx.appcompat:appcompat:1.4.1'
+    implementation "androidx.constraintlayout:constraintlayout:2.1.3"
 
     implementation project(':brouter-mapaccess')
     implementation project(':brouter-core')
diff --git a/brouter-routing-app/src/main/java/btools/routingapp/BImportActivity.java b/brouter-routing-app/src/main/java/btools/routingapp/BImportActivity.java
index 8bd33de..2550bf9 100644
--- a/brouter-routing-app/src/main/java/btools/routingapp/BImportActivity.java
+++ b/brouter-routing-app/src/main/java/btools/routingapp/BImportActivity.java
@@ -76,8 +76,8 @@ public class BImportActivity extends AppCompatActivity {
     try (Cursor cursor = this.getContentResolver().query(intent.getData(), new String[]{
       OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE}, null, null, null)) {
       if (cursor != null && cursor.moveToFirst()) {
-        filename = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME));
-        filesize = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
+        filename = cursor.getString(cursor.getColumnIndexOrThrow(OpenableColumns.DISPLAY_NAME));
+        filesize = cursor.getLong(cursor.getColumnIndexOrThrow(OpenableColumns.SIZE));
       }
     }
     // is the file extention ".brf" in the file name