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org.eclipse.core.runtime.CoreException: Plug-in com.onenetwork.platform.sdk was unable to load class com.transcendsys.platform.studio.standardprocesstype.ept.EptEditor.

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A SDK user came across this error when trying to open an EPT in Studio.

*org.eclipse.core.runtime.CoreException: Plug-in com.onenetwork.platform.sdk was unable to load class com.transcendsys.platform.studio.standardprocesstype.ept.EptEditor.*

What causes this error, and how do we resolve it?

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Caused by: java.lang.ClassNotFoundException: org.w3c.dom.ElementTraversal cannot be found by com.onenetwork.platform.sdk_1.0.0
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Topic starter

In this case, the developer had Oracle Java Developer Kit 1.8 installed on their computer. However, the version of One Network's platform he was working with required Open JDK 12.

Uninstalling JDK 8 resolved the issue for the developer.