我是一个项目的新手并创建了一个新的 SSIS 包。当我通过双击它执行包时，它可以工作。当我输入外壳时：
dtexec /F "D:\path\to\my\ssis\package\mypackage.dtsx" /SET \Package.Variables[User::MyVariable].Properties[Value];"10"
它也有效。但是当我运行具有以下代码的存储过程时：
EXEC xp_cmdshell 'dtexec /F "D:\path\to\my\ssis\package\mypackage.dtsx" /SET \Package.Variables[User::MyVariable].Properties[Value];"10"'
它失败。错误的来源：mypackage Connectio manager“我的连接管理器”描述：“用户'myUser'登录失败。” 'myUser' 有权执行 xp_cmdshell。它是代理用户。奇怪的是，我可以毫无问题地执行其他包，只是这个不起作用。知道我错过了什么吗？（顺便说一句：所有包都有 DontSaveSensitive 保护级别）
这是完整的错误消息，有什么想法吗？
Elapsed: 0.296 seconds
Finished: 10:33:44
Started: 10:33:44
DTExec: The package execution returned DTSER_FAILURE (1).
End Warning
d in MaximumErrorCount. Change the MaximumErrorCount or fix the errors.
Description: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specifie
Source: csv_v1_import_package
Code: 0x80019002
Warning: 2013-07-18 10:33:44.60
End Error
Description: Failed to acquire connection "My Connection Manager". Connection may not be configured correctly or you may not have the right permissions on this connection.
Source: Update MyTable SQL Code Execute SQL Task
Code: 0xC00291EC
Error: 2013-07-18 10:33:44.60
End Error
An OLE DB record is available. Source: "Microsoft OLE DB Provider for SQL Server" Hresult: 0x80040E4D Description: "Login failed for user 'MY_SERVER\username'.".
Description: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80040E4D.
Source: csv_v1_import_package Connection manager "My Connection Manager"
Code: 0xC0202009
Error: 2013-07-18 10:33:44.60
Started: 10:33:44
NULL
Copyright (C) Microsoft Corporation 2010. All rights reserved.
Version 10.50.4000.0 for 64-bit
Microsoft (R) SQL Server Execute Package Utility