# Compilation error in resolving a package in site/pom.xml, during v12.6.9 to v13.4.2 upgrade **URL:** \ **Category:** Experience Manager (PaaS/OnPrem)\ **Created:** [July 31, 2020, 5:26pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050 "2020-07-31T17:26:51Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![skonka](https://avatars.discourse-cdn.com/v4/letter/s/8797f3/32.png) [@skonka](https://community.bloomreach.com/u/skonka)\ **Post date:** [July 31, 2020, 5:26pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050/1 "2020-07-31T17:26:51Z")
Hello! I’m currently trying to upgrade brxp from 12.6.9 to 13.4.3. I’ve followed the upgrade steps listed here [https://documentation.bloomreach.com/13/about/upgrade/introduction.html](https://documentation.bloomreach.com/13/about/upgrade/introduction.html) and I’m unable to compile the project. I have a custom class inside site module that extends “AbstractAsynchronousComponentWindowRenderer” from hst-core.jar . The jar is also available in 13.4.2 and I added the right dependency to the site/pom.xml When I try to import with the package “import org.hippoecm.hst.core.container.\*”, where this class is located - the project is importing classes from “hst-api.jar” instead of “hst-core.jar” and this is leading to a compilation error. More than bloomreach, seems to be a simple dependency resolution issue. Would really appreciate any ideas or help to resolve this, if others have experienced anything similar! ---
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [August 4, 2020, 1:15pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050/2 "2020-08-04T13:15:41Z")
@Tom_Roelfsema Apologies for troubling you bro. Would really appreciate any help to resolve this issue. Thanks in advance. ---
**Author:** ![woonsanko](https://avatars.discourse-cdn.com/v4/letter/w/b5a626/32.png) [@woonsanko](https://community.bloomreach.com/u/woonsanko)\ **Post date:** [August 4, 2020, 1:45pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050/3 "2020-08-04T13:45:54Z")
As `AbstractAsynchronousComponentWindowRenderer` just implements `AsynchronousComponentWindowRenderer` interface in hst-api with a minimal implementation (only the simple `#createAsyncComponentRenderingURL()`), I’d change the custom code to directly implement the interface and copy the method to the custom class, dropping the dependency on `AbstractAsynchronousComponentWindowRenderer`. Regards, Woonsan ---
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [August 4, 2020, 2:57pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050/4 "2020-08-04T14:57:00Z")
HTH Thank you for the quick response @woonsanko ---
**Author:** ![Yeshwanth\_Lagala](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/yeshwanth_lagala/32/777_2.png) [@Yeshwanth\_Lagala](https://community.bloomreach.com/u/Yeshwanth_Lagala)\ **Post date:** [August 4, 2020, 3:12pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050/5 "2020-08-04T15:12:33Z")
@woonsanko We also have a similar issue where we have added “hst-core” dependency in our site/pom.xml and added import statement to our java class. import org.hippoecm.hst.site.request.ResolvedSiteMapItemImpl; But it results in compilation failure. PFB error details. [ERROR] C:\Workspace\xxxx\site\src\main\java\xxxx\common\request\xxxxxxx.java:[182,19] error: cannot find symbol [ERROR] symbol: class ResolvedSiteMapItemImpl [ERROR] location: class xxxxxxxxxxxxxxxx ---
**Author:** ![bcanvural](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.bloomreach.com/bcanvural/32/235_2.png) [@bcanvural](https://community.bloomreach.com/u/bcanvural)\ **Post date:** [August 4, 2020, 3:32pm UTC](https://community.bloomreach.com/t/compilation-error-in-resolving-a-package-in-site-pom-xml-during-v12-6-9-to-v13-4-2-upgrade/2050/6 "2020-08-04T15:32:12Z")
Note that you shouldn’t be adding hst-core to the site application starting from v13. If you relied on it before, find a way to refactor the code so you don’t rely on the jar anymore