Hi, 

Yes, I did confirm the filename does have the file extension but I am still getting the error.  Any help appreciated.

Below is the request body

=============================

{
   "$content-type": "multipart/form-data",
   "$multipart": [
 {
   "headers": {
     "Content-Disposition": "form-data; name=\"electronicDocument\"; filename=@{outputs('Get_file_metadata')?['body/Name']}",
     "Content-Transfer-Encoding": "binary"
   },
   "body": @{body('Get_file_content_using_path')}
 },
 {
   "headers": {
     "Content-Disposition": "form-data; name=\"request\"",
     "Content-Transfer-Encoding": "binary"
   },
   "body": {
      "name": "{documentName}",
     "autoRename": true,
     "metadata": {
       "templateName": "test tempate",
       "fields": [
         {
           "name": "Image Name",
           "values": [
             "12345"
           ]
         },
         {
           "name": "NUmber",
           "values": [
             "123"
           ]
         }
       ]
     }
   }
 }
   ]
 }