diff --git a/Manifest.toml b/Manifest.toml
index fb7ed22..28bbb38 100644
--- a/Manifest.toml
+++ b/Manifest.toml
@@ -2,7 +2,7 @@
 
 julia_version = "1.12.6"
 manifest_format = "2.0"
-project_hash = "866f6d0804412d52eacd6423616500484f0060f0"
+project_hash = "077e6beb148583a11d2d65eed055b8ff4a7db4b6"
 
 [[deps.AliasTables]]
 deps = ["PtrArrays", "Random"]
@@ -812,7 +812,7 @@ version = "1.0.21+0"
 deps = ["Arrow", "Base64", "DataFrames", "Dates", "GeneralUtils", "HTTP", "JSON", "NATS", "PrettyPrinting", "Revise", "UUIDs"]
 path = "."
 uuid = "f2724d33-f338-4a57-b9f8-1be882570d10"
-version = "0.5.6"
+version = "1.2.1"
 
 [[deps.nghttp2_jll]]
 deps = ["Artifacts", "Libdl"]
diff --git a/Project.toml b/Project.toml
index a1b711b..6488c5e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "msghandler"
 uuid = "f2724d33-f338-4a57-b9f8-1be882570d10"
-version = "1.2.0"
+version = "1.2.1"
 authors = ["narawat <narawat@gmail.com>"]
 
 [deps]
diff --git a/src/msghandler.jl b/src/msghandler.jl
index 6ac75fa..ed374e9 100644
--- a/src/msghandler.jl
+++ b/src/msghandler.jl
@@ -452,19 +452,20 @@ function smartpack(
   payloads = msg_payload_v1[]
   for (dataname, payload_data, payload_type) in data
     # @show dataname typeof(payload_data)
+    # @info "msghandler smartpack() 1" @__LINE__
 
     # Serialize data based on type. use bytes as medium for every datatype
     payload_bytes = _serialize_data(payload_data, payload_type)
-    
+    # @info "msghandler smartpack() 2" @__LINE__
     payload_size = length(payload_bytes)  # Calculate payload size in bytes
-    log_trace(correlation_id, "Serialized payload '$dataname' (payload_type: $payload_type) size: $payload_size bytes")  # Log payload size
+    # log_trace(correlation_id, "Serialized payload '$dataname' (payload_type: $payload_type) size: $payload_size bytes")  # Log payload size
     
     # Decision: Direct vs Link
     if payload_size < size_threshold  # Check if payload is small enough for direct transport
       # Direct path - Base64 encode and include in message envelope
       payload_b64 = Base64.base64encode(payload_bytes)  # Encode bytes as base64 string
-      log_trace(correlation_id, "Using direct transport for $payload_size bytes")  # Log transport choice
-      
+      # log_trace(correlation_id, "Using direct transport for $payload_size bytes")  # Log transport choice
+      # @info "msghandler smartpack() 3" @__LINE__
       # Determine encoding based on payload_type
       encoding = "base64"
       if payload_type == "jsontable"
@@ -486,8 +487,9 @@ function smartpack(
       )
       push!(payloads, payload)
     else
+      # @info "msghandler smartpack() 4" @__LINE__
       # Link path - Upload to HTTP server, include URL in message envelope
-      log_trace(correlation_id, "Using link transport, uploading to fileserver")  # Log link transport choice
+      # log_trace(correlation_id, "Using link transport, uploading to fileserver")  # Log link transport choice
       
        # Upload to HTTP server
        response = fileserver_upload_handler(fileserver_url, dataname, payload_bytes)
@@ -497,7 +499,7 @@ function smartpack(
       end
       
       url = response["url"]  # URL for the uploaded data
-      log_trace(correlation_id, "Uploaded to URL: $url")  # Log successful upload
+      # log_trace(correlation_id, "Uploaded to URL: $url")  # Log successful upload
 
       # Determine encoding based on payload_type
       encoding = "none"
@@ -520,6 +522,7 @@ function smartpack(
       )
       push!(payloads, payload)
     end
+    # @info "msghandler smartpack() 5" @__LINE__
   end
 
   # Create msg_envelope_v1 with all payloads
@@ -549,7 +552,7 @@ function smartpack(
   #   # Publish message to NATS using existing connection
   #   publish_message(NATS_connection, subject, env_json_str, correlation_id)  
   # end
-  
+  # @info "msghandler smartpack() 6" @__LINE__
   return (env, env_json_str)
 end
 
@@ -637,21 +640,22 @@ function _serialize_data(data::Any, payload_type::String)
   """
 
   if payload_type == "text"  # Text data - convert to UTF-8 bytes
-    if isa(data, String)
-      data_bytes = Vector{UInt8}(data) # Convert string to UTF-8 bytes
-        return data_bytes  
-    else
-        error("Text data must be a String")
-    end
+    # @info "msghandler _serialize_data() 1" @__LINE__
+    data_bytes = Vector{UInt8}(string(data)) # Convert string to UTF-8 bytes
+    return data_bytes  
   elseif payload_type == "dictionary"  # JSON data - serialize directly
+    # @info "msghandler _serialize_data() 2" @__LINE__
     json_str = JSON.json(data)  # Convert Julia data to JSON string
     json_str_bytes = Vector{UInt8}(json_str) # Convert JSON string to bytes
     return json_str_bytes 
   elseif payload_type == "arrowtable"  # Arrow table data - convert to Arrow IPC stream
+    # @info "msghandler _serialize_data() 3" @__LINE__
     io = IOBuffer()  # Create in-memory buffer
     Arrow.write(io, data)  # Write data as Arrow IPC stream to buffer
     return take!(io)  # Return the buffer contents as bytes
   elseif payload_type == "jsontable"  # JSON table data - convert to JSON
+    # @info "msghandler _serialize_data() 4" @__LINE__
+
     # data can be Vector{NamedTuple}, Vector{Dict}, or DataFrame
     # If DataFrame, convert to Vector{Dict} first
     if isa(data, DataFrame)
@@ -667,29 +671,35 @@ function _serialize_data(data::Any, payload_type::String)
       json_str = JSON.json(rows)
       return Vector{UInt8}(json_str)
     else
+      # @info "msghandler _serialize_data() 5" @__LINE__
+      
       # Already Vector{NamedTuple} or Vector{Dict}
       json_str = JSON.json(data)
       return Vector{UInt8}(json_str)
     end
   elseif payload_type == "image"  # Image data - treat as binary
+    # @info "msghandler _serialize_data() 6" @__LINE__
     if isa(data, Vector{UInt8})
         return data  # Return binary data directly
     else
         error("Image data must be Vector{UInt8}")
     end
   elseif payload_type == "audio"  # Audio data - treat as binary
+    # @info "msghandler _serialize_data() 7" @__LINE__
     if isa(data, Vector{UInt8})
         return data  # Return binary data directly
     else
         error("Audio data must be Vector{UInt8}")
     end
   elseif payload_type == "video"  # Video data - treat as binary
+    # @info "msghandler _serialize_data() 8" @__LINE__
     if isa(data, Vector{UInt8})
         return data  # Return binary data directly
     else
         error("Video data must be Vector{UInt8}")
     end
   elseif payload_type == "binary"  # Binary data - treat as binary
+    # @info "msghandler _serialize_data() 9" @__LINE__
     if isa(data, IOBuffer)  # Check if data is an IOBuffer
         return take!(data)  # Return buffer contents as bytes
     elseif isa(data, Vector{UInt8})  # Check if data is already binary
@@ -698,6 +708,7 @@ function _serialize_data(data::Any, payload_type::String)
         error("Binary data must be binary (Vector{UInt8} or IOBuffer)")
     end
   else  # Unknown type
+    # @info "msghandler _serialize_data() 10" @__LINE__
     error("Unknown payload_type: $payload_type")
   end
 end