# Trouble installing reference app - standalone on windows 11

**URL:** <https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260>\
**Category:** Uncategorized\
**Created:** [March 31, 2023, 3:37pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260 "2023-03-31T15:37:47Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![kjoel](https://talk.openmrs.org/letter_avatar/kjoel/32/5_5575768a8748004e209b776fc1b2916d.png) [@kjoel](https://talk.openmrs.org/u/kjoel)\
**Post date:** [March 31, 2023, 3:37pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260/1 "2023-03-31T15:37:47Z")

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![Screenshot 2023-03-31 113649](https://talk.openmrs.org/uploads/default/original/3X/d/1/d16f3df701ee8e87c54c6a747d1f5ea094265c33.png)

The picture above shows the error returned as I try to run the Jar file. Please help!!

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**Author:** ![dkayiwa](https://talk.openmrs.org/user_avatar/talk.openmrs.org/dkayiwa/32/179_2.png) [@dkayiwa](https://talk.openmrs.org/u/dkayiwa)\
**Post date:** [April 12, 2023, 12:54pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260/2 "2023-04-12T12:54:37Z")

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Which version of Java are you running?

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**Author:** ![kjoel](https://talk.openmrs.org/letter_avatar/kjoel/32/5_5575768a8748004e209b776fc1b2916d.png) [@kjoel](https://talk.openmrs.org/u/kjoel)\
**Post date:** [April 12, 2023, 1:08pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260/3 "2023-04-12T13:08:35Z")

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I installed the JDK 20 for windows

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**Author:** ![jwnasambu](https://talk.openmrs.org/user_avatar/talk.openmrs.org/jwnasambu/32/13543_2.png) [@jwnasambu](https://talk.openmrs.org/u/jwnasambu)\
**Post date:** [April 12, 2023, 1:09pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260/4 "2023-04-12T13:09:46Z")

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Kindly use java 8 please!

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**Author:** ![kjoel](https://talk.openmrs.org/letter_avatar/kjoel/32/5_5575768a8748004e209b776fc1b2916d.png) [@kjoel](https://talk.openmrs.org/u/kjoel)\
**Post date:** [April 12, 2023, 1:22pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260/5 "2023-04-12T13:22:46Z")

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Okay. I’ll try that, thank you.

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**Author:** ![kjoel](https://talk.openmrs.org/letter_avatar/kjoel/32/5_5575768a8748004e209b776fc1b2916d.png) [@kjoel](https://talk.openmrs.org/u/kjoel)\
**Post date:** [April 25, 2023, 7:23pm UTC](https://talk.openmrs.org/t/trouble-installing-reference-app-standalone-on-windows-11/39260/6 "2023-04-25T19:23:40Z")

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Thank you so much. Reinstalling Java 8 solved the issue.