Unable load list of identities from target collection.

[Demonszzj]

`{
"Serilog": {
"MinimumLevel": "Information"
},
"MigrationTools": {
"Version": "16.1",
"Endpoints": {
"Source": {
"EndpointType": "TfsTeamProjectEndpoint",

    "Collection": "https://xxx.xxx.com/xxxx/",
    "Project": "xxxx",
    "Authentication": {
      "AuthenticationMode": "AccessToken",
      "NetworkCredentials": {
        "Domain": "",
        "UserName": "xxxx",
        "Password": "xxxx"
      },
      "AccessToken": "xxxxxxxxxxxxxxxxxxxxxxxxx"
    },
    "ReflectedWorkItemIdField": "Custom.MigratedWorkItemId",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  },
  "Target": {
    "EndpointType": "TfsTeamProjectEndpoint",
    "Collection": "https://xxx.xxx.com/xxxxxx/",
    "Project": "test",
    "Authentication": {
      "AuthenticationMode": "AccessToken",
      "NetworkCredentials": {
        "Domain": "",
        "UserName": "xxxxx",
        "Password": "xxxxxxx"
      },
      "AccessToken": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
    },
    "ReflectedWorkItemIdField": "Custom.MigratedWorkItemId",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  }
},
"Processors": [
  {
    "ProcessorType": "TfsWorkItemMigrationProcessor",
    "Enabled": true,
    "UpdateCreatedDate": true,
    "UpdateCreatedBy": true,
    "WIQLQuery": "SELECT [System.Id] FROM WorkItems WHERE [System.TeamProject] = @TeamProject AND [System.WorkItemType] NOT IN ('Test Suite', 'Test Plan','Shared Steps','Shared Parameter','Feedback Request') ORDER BY [System.ChangedDate] desc",
    "FixHtmlAttachmentLinks": true,
    "WorkItemCreateRetryLimit": 5,
    "FilterWorkItemsThatAlreadyExistInTarget": false,
    "GenerateMigrationComment": true,
    "SourceName": "Source",
    "TargetName": "Target"
  }
],
"CommonTools": {
  "FieldMappingTool": {
    "Enabled": true,
    "FieldMaps": [
      {
        "FieldMapType": "FieldLiteralMap",
        "targetField": "Custom.SomeField",
        "value": "New field value",
        "ApplyTo": [
          "SomeWorkItemType"
        ]
      }
    ]
  }
}

}
}`

I'm working on migrating the code, boards, test cases etc from one collection to the another collection. The document and video helped a lot. Now, there's a problem about identity and RefectedWorkItemId field in target collection. My PAT has full access on source and target, and the connections are successful for both source and target projects.

[MrHinsh]

You have Work items in scope for the migration that do not have the ReflectedWorkItemId field... it looks like you are migrating a non English language version of TFS.

Try running this in Terminal before you run the migration command:

[Console]::OutputEncoding = [System.Text.Encoding]::UTF8

That should get rid of the "????"

Note: This worked's on my system without the above code. Can you try pasting:

"こんにちは世界"  # Japanese
"Привет мир"     # Russian
"مرحبا بالعالم"  # Arabic
"你好，世界"      # Chinese

You should see the chars?

[Demonszzj]

Thanks for reply! The errors still there:
migration-errors20250427.log
Here's my config file:
{ "Serilog": { "MinimumLevel": "Information" }, "MigrationTools": { "Version": "16.1", "Endpoints": { "Source": { "EndpointType": "TfsTeamProjectEndpoint", "Collection": "https://xxx.xxx.com/xxx/", "Project": "xxxxx", "Authentication": { "AuthenticationMode": "AccessToken", "NetworkCredentials": { "Domain": "", "UserName": "xxx", "Password": "xxxxxxxx" }, "AccessToken": "xxxxxxxxxxxxxxxxxxxxxxx" }, "ReflectedWorkItemIdField": "Custom.MigratedWorkItemId", "LanguageMaps": { "AreaPath": "区域", "IterationPath": "迭代" } }, "Target": { "EndpointType": "TfsTeamProjectEndpoint", "Collection": "https://xxx.xxx.com/Projects/", "Project": "same_name_as_source_project", "Authentication": { "AuthenticationMode": "AccessToken", "NetworkCredentials": { "Domain": "", "UserName": "xxx", "Password": "xxxxxxxxxxxxxxxxxxxxxx" }, "AccessToken": "xxxxxxxxxxxxxxxxxxxxxxxxxxxx" }, "ReflectedWorkItemIdField": "Microsoft.VSTS.Build.IntegrationBuild", "LanguageMaps": { "AreaPath": "区域", "IterationPath": "迭代" } } }, "Processors": [ { "ProcessorType": "TfsWorkItemMigrationProcessor", "Enabled": true, "UpdateCreatedDate": true, "UpdateCreatedBy": true, "WIQLQuery": "SELECT [System.Id] FROM WorkItems WHERE [System.TeamProject] = @TeamProject AND [System.WorkItemType] IN ('测试用例','共享步骤','共享参数') ORDER BY [System.ChangedDate] desc" } ], "CommonTools": { "FieldMappingTool": { "Enabled": true, "FieldMaps": [ { "FieldMapType": "FieldLiteralMap", "targetField": "Custom.SomeField", "value": "New field value", "ApplyTo": [ "SomeWorkItemType" ] } ] }, "TfsUserMappingTool":{ "Enabled": true, "UserMappingFile": "C:\\temp\\userExport.json", "IdentityFieldsToCheck": [ "System.AssignedTo", "System.ChangedBy", "System.CreatedBy", "Microsoft.VSTS.Common.ActivatedBy", "Microsoft.VSTS.Common.ResolvedBy", "Microsoft.VSTS.Common.ClosedBy" ] } } } }

The problem now is in this pic: