Environment variables

Reference of the environment variables that change how UiPath Robot 2026.10 runs, logs, and connects, with where each one is set.

These environment variables change how the Robot behaves on a machine. Set them as system (machine) environment variables, except UIPATH_TRACING_ENABLED, which the job process reads: set it for each process or job in Orchestrator. The Robot reads the machine variables when its processes start, so restart the Robot Service after you add or change one.

Variable	Effect	Details
UIPATH_APPLY_SERVICE_PROXY	Robot processes take their proxy from the machine-level proxy.json file. Added in 2026.0.201.	Redirecting robots through a proxy server
UIPATH_DISABLE_ACTIVITY_TRACING	Turns off activity tracing for RPA processes and test cases.	Tracing and data controls
UIPATH_DISABLE_PRE_LOADED_EXECUTOR	Turns off the preloaded executor.	Configuring preloaded execution
UIPATH_DNS_MACHINENAME	Uses the DNS host name for localhost when the Robot creates RDP sessions, for environments with Kerberos authentication for RDP.	Windows sessions
UIPATH_EXECUTOR_STARTUP_DELAY	Adds a delay, in seconds, between session creation and Executor startup.	Configuration files
UIPATH_EXECUTORS_HOST_PRELOAD	Off (default) or On. On starts the executor hosts when the Robot connects instead of at the first job.	Configuring preloaded execution
UIPATH_FAILED_SESSION_SCREENSHOTS	Maximum number of screenshots kept when a session fails. The default is 100.	Windows sessions
UIPATH_FILE_LOG_LEVEL	Sets the log level for local log files, separate from the level sent to Orchestrator.	Log levels
UIPATH_HEADLESS_WITH_USER	Runs background unattended jobs under the user set in Orchestrator, instead of the NT AUTHORITY\Local Service account.	Background automations
UIPATH_HTTP_CONNECTION_LIFETIME	Sets how long, in seconds, the connection to Orchestrator stays open before it's refreshed. The default is 1800.	Configuration files
UIPATH_LANGUAGE	Sets the language the Robot operates in.	Configuration files
UIPATH_MEDIUMPLUS_EXECUTOR	Starts the Robot Executor at the Medium+ integrity level.	Robot Executor
UIPATH_MEDIUMPLUS_INVOKE	Lets Invoke Workflow File and Invoke Process run at the Medium+ integrity level when the activity requests it.	Robot Executor
UIPATH_PIP_SESSION_TIMEOUT	Sets the timeout, in seconds, for starting a process in a Robot session. The default is 180.	Configuration files
UIPATH_PRELOADED_RUNTIMES	With preloading on, limits it to the named executor packages, separated by ;, ,, or :. Empty means every package the feed offers.	Configuring preloaded execution
UIPATH_PRE_LOADED_EXECUTOR	Sets which preloaded executors start with the Robot.	Configuring preloaded execution
UIPATH_PRESERVE_CREDENTIALS_CASE	Keeps the original casing of the logon credentials (domain\username).	Configuration files
UIPATH_ROBOTJS_ALLOWLIST	Accepts the RobotJS consent dialog automatically for the listed URLs.	Configuration steps
UIPATH_SESSION_BEHAVIOR	Sets how the Robot restores the Windows session after a job.	Configuration files
UIPATH_SESSION_TIMEOUT	Sets the timeout, in seconds, for creating an interactive session. The default is 60.	Configuration files
UIPATH_TELEMETRY_DISABLED	Turns Robot telemetry off. Takes precedence over Telemetry.Enabled in UiPath.config.	Tracing and data controls
UIPATH_TRACING_ENABLED	For coded agents and functions: any value other than true stops sending traces. Read by the uipath SDK 2.8.36 or later, not by the Robot.	Tracing and data controls
UIPATH_VERBOSE_LOG_LIMIT	Sets the maximum number of Verbose logs per Executor process. The default is 10000.	Log levels
NUGET_FALLBACK_PACKAGES	Sets the paths to fallback packages folders.	Configuration files
NUGET_SCRATCH	Sets a temporary folder that lets several User Mode robots on one machine share a packages path.	Configuration files