Hotfix CZ02043 can be downloaded 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 “/AvailableDownloads/MFT/PlatformServer/zOS/7.2.0/” to download the hotfix.

The .zip file has the Readme file inside. Please unzip the file and review the Readme file for instructions on how to apply the hotfix.

Supercedes:      N/A
PreReq HotFix: CZ02021, CZ02035, CZ02041

Note: Hotfixes CZ02021, CZ02035 and CZ02041 MUST be applied before applying
      this hotfix.
 
Problem Description:
This hotfix resolves defects that have been fixed since hotfix CZ02041
was released.
 
Defects fixed in CZ02043:
PSZ-432 Long running Send Command transfers failed with a timeout when
        firewalls terminated the connection due to inactivity