执行故障排除

邮件太大，无法处理

描述

Automations that process large volumes of data may fail due to the following error: "Message: Could not retrieve the result of the job execution. This might be because a message was too large to process. Exception Type: System.Exception".

潜在问题

The data produced by the automation exceeds the value of the maxMessageSizeInMegabytes parameter in the uipath.config file.

解决方案

Configure the automation to save the output in a Storage Bucket in Orchestrator or in Data Service, rather than using an output argument.

Unattended automations using UIAutomation activities do not work

描述

Unattended automations using UIAutomation activities do not work.

潜在问题

When a program such as Server Manager, set to start up automatically, shows a Windows User Account Control (UAC) prompt, it prevents the Robot from interacting with the user interface.

解决方案

Identify the program that triggers the User Account Control (UAC) prompt and configure it so that it does not start up automatically.

机器人无法启动执行

描述

The Robot fails to start the execution of an automation and displays the following error: "Executor start process failed, reason System.Runtime.InteropServices.COMException: A specified logon session does not exist. It may already have been terminated.".

The following tables summarizes several issues and their solutions.

潜在问题	解决方案
The Robot machine does not have enough resources (such as CPU, RAM, or Disk Space), so the Robot Executor is unable to start the automation.	Make sure that the Robot machine has enough resources (such as CPU, RAM, or Disk Space). Check the connection time by using the mstsc command-line function. It needs to be greater than 60 seconds, otherwise the error is displayed.
当前无法创建登录会话。以下情况中可能会出现此问题： The Login to Console property is set to True for High-Density (HD) robots. In this case, the Robot Service attaches itself to the current console session. This is not recommended for HD Robots, because there can only be one active console session at a time. Multiple RDP sessions on desktop Windows versions (not Servers). Desktop Windows versions can only handle one RDP session at a time per machine, whereas Windows Server versions can handle multiple RDP sessions.	在此情况下，您需要执行以下某项操作： Set Login to Console to False. This means that the Robot Service initiates an RDP connection from the Robot machine onto itself and attaches to it. This is the recommended method for HD Robots. Check the Windows version, it needs to be Windows Server. Check if the Studio and Robot versions is greater than 2018.1.3. Increase the value of the UIPATH_SESSION_TIMEOUTsystem environment variable on your server. The default value is 60 seconds, which might be insufficient due to slow performance on some machines. Restart the Robot Service after modifying this variable. Check if your Remote Desktop License is active on the server. Check if the Robots are in the proper groups. Local users need to be in the same Remote Desktop group. Check if the username of your RDP connection to the Robot machine is the same as the configured one. To avoid this error, sign off all the RDP connections on the Robot machine.

未提供密码

描述

Starting an automation from Orchestrator or Assistant displays the following error message: "Executor start process failed, reason System.UnauthorizedAccessException: Access is denied.".

The following table summarizes the potential issues and their solutions:

潜在问题	解决方案
The Robot account was created without a password.	Edit the robot account in Orchestrator and provide the following values: Domain\Username* - The username used to connect to the machine on which the Robot is installed. If the user is under a domain, you are required to also specify it in a DOMAIN\UserName format. Password - The Windows login password.
The Robot Service is inactive.	Open the Services window. Select the UiPathRobotSvc service. Open the Properties panel for the selected service. On the Log On tab, select Local System account. Select Apply and OK to confirm the changes, then close the window. This ensures the Robot Service is running and has all the privileges it needs for executing automations.
机器人计算机不再拥有管理员权限。	Log in to the Robot machine with the same set of credentials with which you created the Robot in Orchestrator. If a process fails to start from the Assistant, then you need to contact your network administrator to allow admin rights for that user account.

System.Collections.IEnumerable 无法序列化

描述

When using a Data Table in a Wait For Task and Resume activity, it returns the following error: "Exception: Type 'System.Collections.IEnumerable' cannot be serialized."

潜在问题

The DataRow object of Data Table cannot be serialized, so it cannot be persisted, leading to potential issues or errors.

解决方案

Execute the Create Form Task activity and build the output by looping through data rows, to create a list of task objects. Then, loop through the output list of task objects using the Parallel For Each or For Each activities. In these loops, execute the Wait for Task and Resume activity for each task object.

Job stopped with an unexpected exit code

描述

Your job execution fails and the following error message is logged in Orchestrator: "Job stopped with an unexpected exit code: 0x40010004".

潜在问题

Commonly, this error occurs when:

• The user account, used by the Robot, is forcibly logged off during the execution of the process.

• The machine on which the Robot is running is manually shut down or restarted during the process execution.

解决方案

To avoid this error, make sure the Robot is installed correctly for the intended type of automation: attended or unattended. Having the Robot installed in User Mode cannot execute unattended automations.

Additionally, configure the Robot session to suit your environment and business needs.