diff --git a/README.md b/README.md
index 084719c..90b7386 100644
--- a/README.md
+++ b/README.md
@@ -58,6 +58,13 @@ As caching is mandatory, it has small side effect on the seeking within current
 available only after the file is fully cached - this can be theoretically improved in the future,
 but it's not priority now.
 
+**d)** It's designed to work with audiobooks split to files by chapters, so typical chapter/files has
+duration between 10 - 90 minutes. Anything else will be suboptimal - too short files will not assure
+appropriate cache ahead ( as caching is done by files). Too big files (like m4b file containing whole
+audiobook) will be hard to navigate (as internal chapters are not supported), slow to transcode,
+plus there is hard limit of 250MB per file (for security reasons).
+
+
 
 How to install
 --------------
diff --git a/app/build.gradle b/app/build.gradle
index 1adfcf6..ac04569 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -18,8 +18,8 @@ android {
         applicationId "eu.zderadicka.audioserve"
         minSdkVersion 21
         targetSdkVersion 28
-        versionCode 21
-        versionName "0.7.1"
+        versionCode 22
+        versionName "0.7.2"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
diff --git a/app/src/main/java/eu/zderadicka/audioserve/AudioService.kt b/app/src/main/java/eu/zderadicka/audioserve/AudioService.kt
index c924c54..68971b6 100644
--- a/app/src/main/java/eu/zderadicka/audioserve/AudioService.kt
+++ b/app/src/main/java/eu/zderadicka/audioserve/AudioService.kt
@@ -356,7 +356,11 @@ class AudioService : MediaBrowserServiceCompat() {
                 scheduler.post {
                     preparer.duplicateInQueue(path) { idx, pos ->
                         Log.d(LOG_TAG, "Duplicted $idx,$pos, current player pos ${player.currentPosition}")
-                        player.seekTo(idx + 1, pos) //TODO find best way for gapless seek +200 looked like better when emulated
+                        try {
+                            player.seekTo(idx + 1, pos) //TODO find best way for gapless seek +200 looked like better when emulated
+                        } catch (e:IllegalSeekPositionException) {
+                            Log.e(LOG_TAG, "Error seeking in duplicated item")
+                        }
                         player.playWhenReady = true
                         deletePreviousQueueItem = idx
 
diff --git a/app/src/main/java/eu/zderadicka/audioserve/data/Utils.kt b/app/src/main/java/eu/zderadicka/audioserve/data/Utils.kt
index 43ae2ea..edf9462 100644
--- a/app/src/main/java/eu/zderadicka/audioserve/data/Utils.kt
+++ b/app/src/main/java/eu/zderadicka/audioserve/data/Utils.kt
@@ -70,7 +70,7 @@ fun parseFolderfromJson(data: String, name: String, path: String) :AudioFolder{
             val path = o.getString("path")!!
             val mime = o.getString("mime")!!
 
-            val metaObject = o.getJSONObject("meta")
+            val metaObject = if (o.isNull("meta")) null else o.getJSONObject("meta")
             val meta = if (metaObject != null) {
                 val duration = metaObject.getInt("duration")
                 val bitrate = metaObject.getInt("bitrate")
diff --git a/app/src/main/java/eu/zderadicka/audioserve/net/FileCache.kt b/app/src/main/java/eu/zderadicka/audioserve/net/FileCache.kt
index ed7e64c..44797b9 100644
--- a/app/src/main/java/eu/zderadicka/audioserve/net/FileCache.kt
+++ b/app/src/main/java/eu/zderadicka/audioserve/net/FileCache.kt
@@ -540,7 +540,7 @@ class FileLoader(private val queue: BlockingDeque<CacheItem>,
                         if (contentLength > MAX_CACHED_FILE_SIZE) {
                             Log.e(LOG_TAG, "File is bigger then max limit")
                             complete = true
-                            break
+                            continue
                         }
                         val buf = ByteArray(LOADER_BUFFER_SIZE)
                         stream = conn.inputStream