diff --git a/build.gradle.kts b/build.gradle.kts
index 08895dd..c3e44b3 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
 
 allprojects {
     group = "ru.inr.mass"
-    version = "0.1.0-SHAPSHOT"
+    version = "0.1.0"
 }
 
 val dataforgeVersion by extra("0.3.0-dev-1")
diff --git a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt
index 38dcc78..ffee513 100644
--- a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt
+++ b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt
@@ -4,6 +4,7 @@ import hep.dataforge.context.Context
 import hep.dataforge.context.logger
 import hep.dataforge.io.io
 import hep.dataforge.io.readEnvelopeFile
+import hep.dataforge.meta.DFExperimental
 import hep.dataforge.meta.Meta
 import ru.inr.mass.data.api.NumassPoint
 import ru.inr.mass.data.api.NumassSet
@@ -21,31 +22,43 @@ public class NumassDirectorySet internal constructor(
     public val path: Path,
 ) : NumassSet {
 
+    @OptIn(DFExperimental::class)
     override val meta: Meta by lazy {
         val metaFilePath = path / "meta"
         if (metaFilePath.exists()) {
-            val envelope = context.io.readEnvelopeFile(path) ?: error("Envelope could not be read from $path")
+            val envelope = context.io.readEnvelopeFile(metaFilePath) ?: error("Envelope could not be read from $metaFilePath")
             envelope.meta
         } else {
+            context.logger.warn { "Meta file does not exist for Numass set $metaFilePath" }
             Meta.EMPTY
         }
     }
 
     override val points: List<NumassPoint> by lazy<List<NumassPoint>> {
-        Files.list(path).filter { it.fileName.startsWith("p") }.map { path ->
+        Files.list(path).filter { it.fileName.startsWith("p") }.map { pointPath ->
             try {
-                context.readNumassFile(path)
+                context.readNumassFile(pointPath)
             } catch (e: Exception) {
-                context.logger.error(e) { "Error reading Numass point file $path" }
+                context.logger.error(e) { "Error reading Numass point file $pointPath" }
                 null
             }
         }.toList().filterNotNull()
     }
 }
 
+@OptIn(DFExperimental::class)
+public fun Context.readNumassFile(path: Path): ProtoNumassPoint? {
+    val envelope = io.readEnvelopeFile(path) ?: error("Envelope could not be read from $path")
+    return ProtoNumassPoint.fromEnvelope(envelope)
+}
+
+public fun Context.readNumassFile(path: String): ProtoNumassPoint? = readNumassFile(Path.of(path))
+
 @OptIn(ExperimentalPathApi::class)
 public fun Context.readNumassDirectory(path: Path): NumassDirectorySet {
     if(!path.exists()) error("Path $path does not exist")
     if(!path.isDirectory()) error("The path $path is not a directory")
     return NumassDirectorySet(this, path)
-}
\ No newline at end of file
+}
+
+public fun Context.readNumassDirectory(path: String): NumassDirectorySet = readNumassDirectory(Path.of(path))
\ No newline at end of file
diff --git a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/readFiles.kt b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/readFiles.kt
deleted file mode 100644
index 446c765..0000000
--- a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/readFiles.kt
+++ /dev/null
@@ -1,13 +0,0 @@
-package ru.inr.mass.data.proto
-
-import hep.dataforge.context.Context
-import hep.dataforge.io.io
-import hep.dataforge.io.readEnvelopeFile
-import java.nio.file.Path
-
-public fun Context.readNumassFile(path: Path): ProtoNumassPoint? {
-    val envelope = io.readEnvelopeFile(path) ?: error("Envelope could not be read from $path")
-    return ProtoNumassPoint.fromEnvelope(envelope)
-}
-
-public fun Context.readNumassFile(path: String): ProtoNumassPoint? = readNumassFile(Path.of(path))
\ No newline at end of file