X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=README.md;fp=README.md;h=7567cd62f707287c053ebce320840d724907d55b;hp=3db0acbd12f1119983f6503f9bbf4a9a528eb6b6;hb=ac03f107a1f6a1d8e011667cd90c75482574c8e5;hpb=e10760b08746837538ad4c2b4c37736aa34c7a47

diff --git a/README.md b/README.md
index 3db0acbd1..7567cd62f 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,9 @@ You can also use newer JDKs but 11 as an LTS version is recommended, especially
    installation to the list and select the added JRE as the active JRE.
 3. Open IDE preference page **Java / Installed JREs / Execution Environments**
    and ensure that your selected JDK is selected in the *Compatible JREs* for `JavaSE-1.6` - `JavaSE-11`.
+4. **Important:** Ensure that IDE preference page **Java / Compiler** has *Compiler compliance level* set to **11**.
+   Otherwise the IDE will use the JDTs compiler to produce the binary classes with the designated compliance level
+   regardless of what JRE you've installed to use for running your programs from the IDE.
 
 #### Clone Repository into Eclipse
 
@@ -95,4 +98,4 @@ which should now succeed.
 #### Test
 
 Open [releng/org.simantics.desktop.rcp.product/simantics-desktop.product](releng/org.simantics.desktop.rcp.product/simantics-desktop.product)
-and press `Launch an Eclipse application in Debug mode`. The basic desktop product should start.
\ No newline at end of file
+and press `Launch an Eclipse application in Debug mode`. The basic desktop product should start.