Endevor Eclipse UI plugin 18.1.7 is installed on Topaz 19.3.1, tried to updates to UI plugin 18.1.8 using "Check for updates" and found the following error:
An error occurred while collecting items to be installed
session context was:(profile=MFWorkbenchEnterprise, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,org.apache.servicemix.bundles.aopalliance,1.0.0.6
Release : 18.0.12
Component : ENDEVOR ECLIPSE PLUGIN 18.1.7
Topaz 19.3.1
The error message is related to the Topaz updates.
Go to Eclipse->help->install new software, and manage the "available software sites", only check the Endevor software update site, and uncheck the Topaz update site.
Then go to help->check for updates
With this setting, Topaz will only check the updates for Endevor Eclipse UI plugin.