You can download this HotFix from TIBCO Support Portal (https://support.tibco.com). You will need to provide your TIBCO Support Portal credentials. Once logged in you can download the hotfix by selecting the “Downloads” -> “Hotfixes” option. Then go to the AvailableDownloads/BusinessWorks/5.15.0/Hotfix-06. 

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Closed Issues in 5.15.0_HF-006 (This Release)

BW-19881
Support for SSL has been added for the TCP palette.

BW-19720
A fix has been implemented to resolve an issue where the Get Shared Variable activity would get stuck inside critical section groups when using MS SQL Server as the engine database.

This update introduces a property-based fix to address the issue. You can now use the property "bw.engine.sharedLockConfigName"=<Shared lock name>, where the name of the shared lock resource should be specified. This property should only be configured when the Get Shared Variable activity is used within a critical section group and execution becomes stuck.
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You can also download the hotfix using the below link:

https://support.tibco.com/s/hotfixes?id=a014z00000yUHikAAG.