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Mainframe – Installing/Upgrading OpenText HostExplorer 15

This article explains how to install and/or upgrade OpenText HostExplorer 15.


IT Services has licensed this software for use by University of Chicago staff and faculty. Staff and faculty of affiliated organizations are NOT included in this license. Further, staff or faculty who leave the University are no longer eligible to use this software, and must remove it from any machine under their purview which it is installed on. This download requires a valid CNetID and CNet password. Only current staff and faculty of the University are eligible to download and use this software. If you have any problems downloading the software, contact the Site Licensing Office.

TN3270 for Macintosh

IT Services does not support tn3270 for Mac OS. However, a secure TN3270 client can be downloaded from Brown University:

You will need to turn on AT-TLS TLSv1 and configure it to connect to port 4992. If FIPS 140-2 Cryptography can be enabled then select this option as well.

Instructions can be found here.

Installing OpenText HostExplorer v15

  1. IMPORTANT: If you are currently logged on to the mainframe and have any open sessions (CICS, TSO, etc.) you MUST COMPLETELY LOG OFF of them all.
    Do NOT use Ctrl-Q hot-key sequence or just disconnect from the mainframe with the light-switch toggle button.
    Failure to completely log off will likely result in problems initiating sessions in CICS (DBCOAS, DBFSESA, DBFSESB, etc.) after the upgrade.

  2. Install OpenText HostExplorer 15

    NOTE: Installation of HostExplorer requires a Windows Administrator account. If this is an issue, then please contact IT Services Support.
  3. Download and run the installation file by clicking this link: OpenText HostExplorer 15

    Depending on the browser you are using and level of Windows, you may see the following during the download. Click Save File.


    After it completes downloading, launch the install program.

    Firefox users can click the green (downloads) arrow in the upper-right corner of the browser window to access the program.

    Click Run

    The installation wizard appears. Click Next

    Click Next

    Click Install

    Click Finish

    From the next screen, click the first bullet point, Install OpenText HostExplorer

    Select Personal Installation

    Select your preferred language, then click OK.

    Click Next

    HostExplorer 15 now gives you the option to preserve any customization you may have performed.

    This is a built-in version of the FSTWizard provided in HostExplorer 14.

    It is strongly recommended that you migrate your current settings. Make sure the Migrate Settings box is checked. Click Next

    Accept the license agreement and click Next

    Click Next

    Click Next

    Select Per User Directory, then click Next

    Select Typical for the setup type and click Next

    Click Next to bypass the Additional Install Options.

    Click Install

    Click OK

    Click Finish

    Click Yes to restart the system.

  4. Reboot the PC
    If not already done, reboot the PC after HostExplorer15 is installed.

  5. Configure encryption using AT-TLS TLSv1
    For instructions on configuring encryption (AT-TLS TLSv1) after installing HostExplorer, see Mainframe - Enabling AT-TLS TLSv1 on HostExplorer

Keywords:mvs, tn3270, uchimvs1, hummingbird, Host, Explorer   Doc ID:58817
Owner:Bob C.Group:University of Chicago
Created:2015-12-09 13:04 CDTUpdated:2017-05-11 12:14 CDT
Sites:University of Chicago, University of Chicago - Sandbox
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