# ERROR: Caught exception \[ERROR: Unsupported command \[selectWindow | win\_ser\_1 | \]\]

**URL:** <https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737>\
**Category:** Web Testing\
**Tags:** katalon-recorder\
**Created:** [March 13, 2018, 12:52am UTC](https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737 "2018-03-13T00:52:27Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Thabithal](https://avatars.discourse-cdn.com/v4/letter/t/8edcca/32.png) [@Thabithal](https://forum.katalon.com/u/Thabithal)\
**Post date:** [March 13, 2018, 12:52am UTC](https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737/1 "2018-03-13T00:52:27Z")

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When I export the script to Java, the Select Window, clickAtAndWait, delay commands give the unsupported command error:

// ERROR: Caught exception [ERROR: Unsupported command [selectWindow | 1 |]]

// ERROR: Caught exception [ERROR: Unsupported command [selectWindow | Login Page |]]

// ERROR: Caught exception [ERROR: Unsupported command [clickAt | id=btnok | 5]]

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**Author:** ![devalex88](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/devalex88/32/336_2.png) [@devalex88](https://forum.katalon.com/u/devalex88)\
**Post date:** [March 13, 2018, 11:53am UTC](https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737/2 "2018-03-13T11:53:31Z")

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Thank you for your feedback. We are working on this issue and will have an update soon.

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**Author:** ![devalex88](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/devalex88/32/336_2.png) [@devalex88](https://forum.katalon.com/u/devalex88)\
**Post date:** [April 5, 2018, 9:25am UTC](https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737/3 "2018-04-05T09:25:13Z")

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I should add that you can use “WebDriver-backed Remote Control” format in the meantime, which provides a broader set of commands.

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**Author:** ![Thabithal](https://avatars.discourse-cdn.com/v4/letter/t/8edcca/32.png) [@Thabithal](https://forum.katalon.com/u/Thabithal)\
**Post date:** [April 13, 2018, 5:37pm UTC](https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737/4 "2018-04-13T17:37:32Z")

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Will try that

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**Author:** ![gary.csaniz](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/gary.csaniz/32/16103_2.png) [@gary.csaniz](https://forum.katalon.com/u/gary.csaniz)\
**Post date:** [May 9, 2021, 4:53pm UTC](https://forum.katalon.com/t/error-caught-exception-error-unsupported-command-selectwindow-win-ser-1/9737/5 "2021-05-09T16:53:33Z")

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What did you try, and did it resolve the issue?

I am getting this exact error. Here are my steps:  
` driver = self.driver driver.get("http://www.adrreports.eu/en/search_subst.html") driver.find_element_by_link_text("C").click() driver.find_element_by_link_text("COVID-19 VACCINE ASTRAZENECA (CHADOX1 NCOV-19)").click()# ERROR: Caught exception [ERROR: Unsupported command [selectWindow | win_ser_1 |]]`