diff --git a/IO.go b/IO.go
index 0e6e0a5..e5bd007 100644
--- a/IO.go
+++ b/IO.go
@@ -5,15 +5,15 @@ func (arch *Archiver) Close() error {
 	arch.crudMutex.Lock()
 	defer arch.crudMutex.Unlock()
 
-	for _, vms := range arch.openFiles {
-		for _, vm := range vms {
-			err := vm.CloseWithNotifyArchiver()
-			if err != nil {
-				arch.log.Warnv("Can not close virtual media", "err", err.Error())
-				return err
-			}
-		}
-	}
+	//for _, vms := range arch.openFiles {
+	//	for _, vm := range vms {
+	//		err := vm.CloseWithNotifyArchiver()
+	//		if err != nil {
+	//			arch.log.Warnv("Can not close virtual media", "err", err.Error())
+	//			return err
+	//		}
+	//	}
+	//}
 	err := arch.fs.Close()
 	if err != nil {
 		arch.log.Warnv("Can not close arch", "err", err.Error())
@@ -26,14 +26,15 @@ func (arch *Archiver) Close() error {
 func (arch *Archiver) Closed(fileID uint32) error {
 	arch.crudMutex.Lock()
 	defer arch.crudMutex.Unlock()
-	vms, ok := arch.openFiles[fileID]
-	if ok {
-		if len(vms) == 1 {
-			delete(arch.openFiles, fileID)
-		} else {
-			// ToDo: get index in addition to fileID
-			arch.openFiles[fileID] = vms[:len(vms)-1]
-		}
-	}
+	//arch.log.Infov("virtual media file ")
+	//vms, ok := arch.openFiles[fileID]
+	//if ok {
+	//	if len(vms) == 1 {
+	//		delete(arch.openFiles, fileID)
+	//	} else {
+	//		// ToDo: get index in addition to fileID
+	//		arch.openFiles[fileID] = vms[:len(vms)-1]
+	//	}
+	//}
 	return nil
 }
diff --git a/crud.go b/crud.go
index c85a51f..84a2a66 100644
--- a/crud.go
+++ b/crud.go
@@ -1,8 +1,6 @@
 package archiverMedia
 
 import (
-	"fmt"
-
 	"github.com/fanap-infra/archiverMedia/pkg/vInfo"
 
 	"github.com/fanap-infra/archiverMedia/pkg/virtualMedia"
@@ -17,7 +15,7 @@ func (arch *Archiver) NewVirtualMediaFile(id uint32, fileName string) (*virtualM
 		return nil, err
 	}
 	vm := virtualMedia.NewVirtualMedia(fileName, id, arch.blockSize, vf, arch, arch.log)
-	arch.openFiles[id] = append(arch.openFiles[id], vm)
+	//arch.openFiles[id] = append(arch.openFiles[id], vm)
 	return vm, nil
 }
 
@@ -38,17 +36,17 @@ func (arch *Archiver) OpenVirtualMediaFile(id uint32) (*virtualMedia.VirtualMedi
 		return nil, err
 	}
 	vm := virtualMedia.OpenVirtualMedia(vf.GetFileName(), id, arch.blockSize, vf, arch, info, arch.log)
-	arch.openFiles[id] = append(arch.openFiles[id], vm)
+	//arch.openFiles[id] = append(arch.openFiles[id], vm)
 	return vm, nil
 }
 
 func (arch *Archiver) RemoveVirtualMediaFile(id uint32) error {
 	arch.crudMutex.Lock()
 	defer arch.crudMutex.Unlock()
-	_, ok := arch.openFiles[id]
-	if ok {
-		return fmt.Errorf("virtual media id : %d is opened", id)
-	}
+	//_, ok := arch.openFiles[id]
+	//if ok {
+	//	return fmt.Errorf("virtual media id : %d is opened", id)
+	//}
 	err := arch.fs.RemoveVirtualFile(id)
 	if err != nil {
 		return err
diff --git a/go.mod b/go.mod
index 199a4cb..940ba55 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/fanap-infra/archiverMedia
 go 1.12
 
 require (
-	github.com/fanap-infra/fsEngine v0.4.14
+	github.com/fanap-infra/fsEngine v0.4.16
 	github.com/fanap-infra/log v1.6.1
 	github.com/golang/protobuf v1.4.2
 	github.com/stretchr/testify v1.7.0
diff --git a/pkg/virtualMedia/IO.go b/pkg/virtualMedia/IO.go
index a7bcf79..7b688d3 100644
--- a/pkg/virtualMedia/IO.go
+++ b/pkg/virtualMedia/IO.go
@@ -91,6 +91,8 @@ func (vm *VirtualMedia) ReadFrame() (*media.Packet, error) {
 }
 
 func (vm *VirtualMedia) GotoTime(frameTime int64) (int64, error) {
+	vm.rxMUX.Lock()
+	defer vm.rxMUX.Unlock()
 	if vm.frameChunkRX != nil {
 		if vm.frameChunkRX.StartTime <= frameTime &&
 			vm.frameChunkRX.EndTime >= frameTime {
diff --git a/pkg/virtualMedia/frame.go b/pkg/virtualMedia/frame.go
index 33fbd29..b166d7e 100644
--- a/pkg/virtualMedia/frame.go
+++ b/pkg/virtualMedia/frame.go
@@ -26,6 +26,7 @@ func generateFrameChunk(med *media.PacketChunk) ([]byte, error) {
 }
 
 func (vm *VirtualMedia) NextFrameChunk() (*media.PacketChunk, error) {
+	//ToDo: do not expose this functions , it is not safe thread
 	frameChunkDataSize := uint32(0)
 	nextFrameChunk := -1
 	errorCounter := 0
@@ -73,6 +74,9 @@ func (vm *VirtualMedia) NextFrameChunk() (*media.PacketChunk, error) {
 			if err == virtualFile.EndOfFile {
 				return nil, EndOfFile
 			}
+			vm.log.Warnv("can not read data", "id", vm.fileID,
+				"nextFrameChunk", nextFrameChunk, "frameChunkDataSize", frameChunkDataSize,
+				"len(vm.vfBuf)", len(vm.vfBuf), "err", err.Error())
 			return nil, err
 		}
 		vm.vfBuf = append(vm.vfBuf, tmpBuf[:n]...)
@@ -80,6 +84,7 @@ func (vm *VirtualMedia) NextFrameChunk() (*media.PacketChunk, error) {
 }
 
 func (vm *VirtualMedia) PreviousFrameChunk() (*media.PacketChunk, error) {
+	//ToDo: do not expose this functions , it is not safe thread
 	if vm.frameChunkRX != nil {
 		if vm.frameChunkRX.Index == 1 || vm.frameChunkRX.PreviousChunkSize == 0 {
 			return nil, fmt.Errorf("there is no previous frame chunk")