# Java extension

**URL:** <https://forum.knime.com/t/java-extension/12003>\
**Category:** KNIME Extensions\
**Created:** [September 6, 2018, 2:00pm UTC](https://forum.knime.com/t/java-extension/12003 "2018-09-06T14:00:47Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![marten\_kose](https://forum-cdn.knime.com/letter_avatar_proxy/v4/letter/m/a87d85/32.png) [@marten\_kose](https://forum.knime.com/u/marten_kose)\
**Post date:** [September 20, 2018, 3:07pm UTC](https://forum.knime.com/t/java-extension/12003/6 "2018-09-20T15:07:45Z")

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Even though your Rserve seems to work properly (as some R nodes execute successfully), you might want to check the version of your Rserve package and in case it is below 1.8-6, try installing it via install.packages(‘Rserve’,“[http://rforge.net/",type="source](http://rforge.net/%22,type=%22source)”) [like it is suggested in another thread](https://forum.knime.com/t/r-snippets-rserve-version-warnings/12059).

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