Error after installation of patch HF 01 to BPM Studio 2020 R1

Overview

You are getting the following errors in the install log after applying a BPM Studio 2020 R1 patch/hotfix:

!ENTRY org.eclipse.core.jobs 4 2 2020-06-15 12:20:38.803
!MESSAGE An internal error occurred during: "Initializing Java Tooling".
!STACK 0
java.lang.NoSuchMethodError: org.eclipse.core.runtime.SubMonitor.split(I)Lorg/eclipse/core/runtime/SubMonitor;
... 3 more

!ENTRY org.eclipse.ui 4 4 2020-06-15 12:20:39.819
!MESSAGE An internal error has occurred.
!STACK 0
java.lang.IllegalStateException: Application does not have an active window
at org.eclipse.e4.ui.internal.workbench.ApplicationPartServiceImpl.getActiveWindowService(ApplicationPartServiceImpl.java:43)
at org.eclipse.e4.ui.internal.workbench.ApplicationPartServiceImpl.findPart(ApplicationPartServiceImpl.java:92)
at org.eclipse.e4.ui.internal.workbench.ApplicationPartServiceImpl.findPart(ApplicationPartServiceImpl.java:92)

BPM Studio will fail to launch post-install and display the same errors as shown: 

Environment

All Supported Operating System Savvion-BPM Studio/Designer 2020 R1 (HF 01)

Solution

The issue occurs due to incomplete download of essential libs while installing the patch.
Install New Software dialog defaults the option for "Contact all update sites during install to find required software" to checked.

If the customer has third-party plugins in their BPM Studio, this setting results in downloading other third-party jars that are not part of the patch and which will cause the installation to fail if the external repositories are unavailable or if there are transport issues such as TLS incompatibility.

The recommendation to resolve this problem is to deselect the "Contact all update sites during install to find required software" checkbox in the Install New Software dialog accessed by going to Help -> Install New Software... from the BPM Studio main menu as shown below:

Testing

Once this option is deselected, the patch should install without errors and you should be able to successfully launch the BPM Studio IDE.