diff --git a/API.go b/API.go
index 44d6d94..d1cb17c 100644
--- a/API.go
+++ b/API.go
@@ -164,7 +164,7 @@ func apiShutdown(backend *core.Backend) func(w http.ResponseWriter, r *http.Requ
 		if action == 0 {
 			// Later: Initiate shutdown signal to core library and wait for all requests to complete.
 
-			backend.Filters.LogError("apiShutdown", "graceful shutdown via API requested from '%s'\n", r.RemoteAddr)
+			backend.LogError("apiShutdown", "graceful shutdown via API requested from '%s'\n", r.RemoteAddr)
 
 			EncodeJSONFlush(backend, w, r, &apiShutdownStatus{Status: 0})
 
@@ -181,7 +181,7 @@ type apiShutdownStatus struct {
 func EncodeJSONFlush(backend *core.Backend, w http.ResponseWriter, r *http.Request, data interface{}) (err error) {
 	response, err := json.Marshal(data)
 	if err != nil {
-		backend.Filters.LogError("EncodeJSONFlush", "error marshalling data for route '%s': %v\n", r.URL.Path, err)
+		backend.LogError("EncodeJSONFlush", "error marshalling data for route '%s': %v\n", r.URL.Path, err)
 		return err
 	}
 
@@ -211,13 +211,13 @@ func processExitMonitor(backend *core.Backend, watchPID int) {
 	// monitor the process
 	process, err := os.FindProcess(watchPID)
 	if err != nil {
-		backend.Filters.LogError("processExitMonitor", "error finding monitored process ID %d: %v\n", watchPID, err)
+		backend.LogError("processExitMonitor", "error finding monitored process ID %d: %v\n", watchPID, err)
 		return
 	}
 
 	_, err = process.Wait()
 	if err == nil {
-		backend.Filters.LogError("processExitMonitor", "graceful shutdown via exit signal from process ID %d\n", watchPID)
+		backend.LogError("processExitMonitor", "graceful shutdown via exit signal from process ID %d\n", watchPID)
 
 		// Later: Initiate shutdown signal to core library and wait for all requests to complete.
 
diff --git a/Command Line.go b/Command Line.go
index 67dbef3..e882377 100644
--- a/Command Line.go	
+++ b/Command Line.go	
@@ -264,7 +264,7 @@ func userCommands(backend *core.Backend, input io.Reader, output io.Writer, term
 		case "log error":
 			fmt.Fprintf(output, "Please choose the target output of error messages:\n0 = Log file (default)\n1 = Command line\n2 = Log file + command line\n3 = None\n")
 			if number, valid, terminate := getUserOptionInt(reader, terminateSignal); valid && number >= 0 && number <= 3 {
-				config.ErrorOutput = number
+				backend.Config.LogTarget = number
 			} else if terminate {
 				return
 			} else {
@@ -444,7 +444,7 @@ func userCommands(backend *core.Backend, input io.Reader, output io.Writer, term
 			go blockTransfer(peer, uint64(blockNumber), output)
 
 		case "exit":
-			backend.Filters.LogError("userCommands", "graceful exit via user terminal command\n")
+			backend.LogError("userCommands", "graceful exit via user terminal command\n")
 			os.Exit(core.ExitGraceful)
 
 		case "search file":
@@ -642,21 +642,6 @@ func GetPeerlistSorted(backend *core.Backend) (peers []*core.PeerInfo) {
 	return peers
 }
 
-// logError handles error messages from core
-func logError(function, format string, v ...interface{}) {
-	switch config.ErrorOutput {
-	case 0:
-		core.DefaultLogError(function, format, v...)
-
-	case 1:
-		fmt.Printf("["+function+"] "+format, v...)
-
-	case 2:
-		core.DefaultLogError(function, format, v...)
-		fmt.Printf("["+function+"] "+format, v...)
-	}
-}
-
 // ---- command-line helper functions ----
 
 // timeRetryUserInput defines how long the code waits for user input from reader before trying again
diff --git a/Main.go b/Main.go
index e7b8fec..c433b72 100644
--- a/Main.go
+++ b/Main.go
@@ -21,10 +21,6 @@ var config struct {
 	// Warning: These settings are currently overwritten (deleted) when the config file is updated by core.
 	// In the future the core package will consider custom config fields.
 
-	// Log settings
-	ErrorOutput int  `yaml:"ErrorOutput"` // 0 = Log file (default),  1 = Command line, 2 = Log file + command line, 3 = None
-	DebugAPI    bool `yaml:"DebugAPI"`    // Enables the debug API which allows profiling. Do not enable in production. Only available if compiled with debug tag.
-
 	// API settings
 	APIListen          []string  `yaml:"APIListen"`          // WebListen is in format IP:Port and declares where the web-interface should listen on. IP can also be ommitted to listen on any.
 	APIUseSSL          bool      `yaml:"APIUseSSL"`          // Enables SSL.
@@ -33,6 +29,7 @@ var config struct {
 	APITimeoutRead     string    `yaml:"APITimeoutRead"`     // The maximum duration for reading the entire request, including the body.
 	APITimeoutWrite    string    `yaml:"APITimeoutWrite"`    // The maximum duration before timing out writes of the response. This includes processing time and is therefore the max time any HTTP function may take.
 	APIKey             uuid.UUID `yaml:"APIKey"`             // API key. Empty UUID 00000000-0000-0000-0000-000000000000 = not used.
+	DebugAPI           bool      `yaml:"DebugAPI"`           // Enables the debug API which allows profiling. Do not enable in production. Only available if compiled with debug tag.
 }
 
 func init() {
@@ -57,7 +54,6 @@ func main() {
 	userAgent := appName + "/" + core.Version
 
 	filters := &core.Filters{
-		LogError:               logError,
 		DHTSearchStatus:        filterSearchStatus,
 		IncomingRequest:        filterIncomingRequest,
 		MessageIn:              filterMessageIn,
diff --git a/go.mod b/go.mod
index 3495dc5..51cc52b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/PeernetOfficial/Cmd
 go 1.16
 
 require (
-	github.com/PeernetOfficial/core v0.0.0-20220106031128-5c8b8eb94bd7
+	github.com/PeernetOfficial/core v0.0.0-20220112211834-6a5312d83433
 	github.com/google/uuid v1.3.0
 	github.com/gorilla/websocket v1.4.3-0.20210424162022-e8629af678b7
 )
diff --git a/go.sum b/go.sum
index b784f78..23e38c4 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 github.com/IncSW/geoip2 v0.1.1 h1:afzzYF7n9JbdcPy8aiBSgBJuXi4mTWXZ3z6V3o6Vg34=
 github.com/IncSW/geoip2 v0.1.1/go.mod h1:adcasR40vXiUBjtzdaTTKL/6wSf+fgO4M8Gve/XzPUk=
-github.com/PeernetOfficial/core v0.0.0-20220106031128-5c8b8eb94bd7 h1:Bb6UCVLSriUYZs5UBO6CtjY98IHAlaGquFSppXmSygE=
-github.com/PeernetOfficial/core v0.0.0-20220106031128-5c8b8eb94bd7/go.mod h1:VNhfwAZqya5JDZTS/ffa8Shof0OmQCx025CQMieGB7o=
+github.com/PeernetOfficial/core v0.0.0-20220112211834-6a5312d83433 h1:p2PXBpPvIlilShSHGG8rozGFRlhcyQNchcyZj2sph0s=
+github.com/PeernetOfficial/core v0.0.0-20220112211834-6a5312d83433/go.mod h1:VNhfwAZqya5JDZTS/ffa8Shof0OmQCx025CQMieGB7o=
 github.com/akrylysov/pogreb v0.10.1 h1:FqlR8VR7uCbJdfUob916tPM+idpKgeESDXOA1K0DK4w=
 github.com/akrylysov/pogreb v0.10.1/go.mod h1:pNs6QmpQ1UlTJKDezuRWmaqkgUE2TuU0YTWyqJZ7+lI=
 github.com/enfipy/locker v1.1.0 h1:2zVJ0ky7cS1Vjs0x6OQWFiT2dSEiHrI5/O2KCz1fgGc=