Want to understand how Target.WaitForReady property exactly works

Hi guys,

As the title suggests, I really want to understand the exact mechanism of the WaitForReady property of an activity.

The following piece is quoted from the ACTIVITIES GUIDE of UiPath.

The default setting is [INTERACTIVE] as we all know and it does pretty well work with most of cases.
However in some circumstances - where certain activity gets paused for a moment although the target is obviously already ready - I had to set it with [NONE] in order to make it proceed.
In that case, I feel like I’d be better off setting [DelayBefore] with reasonable amount of seconds just in case it causes any unexpected exceptions or so.

I’ve tried all of the options to see the difference, but I still don’t understand how those options exactly work behind.

If anyone has any idea or opinion, please share with us.



Anyone know what is difference between INTERACTIVE VS COMPLETE pls advise

Here you go:

WaitForReady – wait for the target to become ready, before performing the activity. There are three available options:

  • None – does not wait for the target to be ready.
  • Interactive – waits until only a part of the app is loaded.
  • Complete – waits for the entire app to be loaded.


WaitForReady - Before performing the actions, wait for the target to become ready. The following options are available:

  • None - Does not wait for anything except the target UI element to exist before executing the action. For example, you can use this option if you want to retrieve just text from a web page or click a particular button, without having to wait for all UI elements to load. Note that this may have unwanted consequences if the button relies on elements which are not yet loaded, such as scripts.
  • Interactive/Complete - Waits all of the UI elements in the target app to exist before actually executing the action.
    To assess if an application is in the Interactive or Complete state, the following tags are verified:
  • Desktop applications - A wm_null message is sent to check the existence of the <wnd> , <ctrl> , <java> , or <uia> tags. If they exist, the activity is executed.
  • Web applications:
    a. Internet Explorer - The <webctrl> tag is used to check if the Ready state of the HTML document is set to Complete . Additionally, the Busy state has to be set to “False”.
    b. Others - The <webctrl> tag is used to check if the Ready state of the HTML document is Complete .
  • SAP applications - First the presence of the <wnd> tag verified, after which a SAP specific API is used to detect if the session is busy or not.

Thank you for the detailed description :+1:


To get the best reliability, I suggest we use COMPLETE as the default value, unless there are any exceptions. What do you guys say?

I say this because in my experience, in order to improve the stability of the bot, COMPLETE seems to be the best option.

1 Like

WaitForReady – wait for the target to become ready, before performing the activity.

  • None – It will not for the element or target to be ready on DOM.
  • Interactive – Its wait till the part of the element or target is ready.
  • Complete – Its wait till whole element get load on DOM.

i don’t think so. It can make your workflow go into an infinite loop in case the application hangs.
I had this issue with SAP, where the workflow ran for 2 days in production because the application did not respond and the robot was waiting. I would suggest to keep this in mind before choosing any option

I’ve had issues where, whenever I had it as the default “interactive”, the bot would skip certain clicks, type into and element exists activities and once I changed it to complete it worked correctly every time. If the application is being unresponsive and results in hanging for a very long time, I would look into the timeout property.