Toshiya Kobayashi created DROOLS-5495: ----------------------------------------- Summary: Drools Builder error "org/apache/commons/math3/util/ArithmeticUtils" by eclipse plugin Key: DROOLS-5495 URL: https://issues.redhat.com/browse/DROOLS-5495 Project: Drools Issue Type: Bug Components: eclipse plugin Affects Versions: 7.39.0.Final Reporter: Toshiya Kobayashi Assignee: Kris Verlaenen Attachments: DroolsBuilderError.png 1. Install eclipse (tested with eclipse-java-2020-03) 2. "Install New Software" to install "Drools and jBPM" plugin via https://download.jboss.org/drools/release/7.39.0.Final/org.drools.updates... 3. Create a project -> Other -> Drools -> Drools Project -> Choose second icon (= a project with sample assets), Press Next -> For "Build the project using:" A) Java and Drools runtime classes -> Use "Manage Runtime Definision" to create a runtime which points to drools-distribution-7.39.0.Final/binaries B) Maven => The issue reproduced in both approaches 4. When you edit DRL or build a project in Eclipse, an error pop-up is raised. See attached DroolsBuilderError.png {noformat} Errors occurred during the build. Errors running builder 'Drools Builder' on project 'Drools_2'. org/apache/commons/math3/util/ArithmeticUtils {noformat} -- This message was sent by Atlassian Jira (v7.13.8#713008)