Download the Software

To install the set of software update patches to your current release, you will need to download the patch files that you put into your worklist during the checklist step.

Use the Altair Accelerator Product Administrator Account

Log in to your computer, into your Altair Accelerator Administrator account. This is the user that was set up to do the standard install, and who owns all the files in the release.

In the following sections, examples will be written as if the user account named rtdamgr is the Altair Accelerator Administrator. If you are installing Accelerator, there is one step in the procedure that must be performed by the root user.

Create or Reuse a Special Patches Directory

Create a new directory or use an existing one to hold the downloaded software update patch files. This directory is in a special location within the current release and must be named patches. It must exist as a subdirectory at the top level of the current release, as a peer directory of the platform specific directories.
To create a new directory on UNIX:
1. Assume that Altair Accelerator is installed at /opt/rtda/ with the current release being 2019.01. The /opt/rtda/2019.01/patches directory is the one that is needed. If /opt/rtda/2019.01/patches directory exists, then use it. If the patches directory needs to be created, complete the following:
```
% cd /opt/rtda/2019.01
% mkdir patches 
```
To create a new directory on Windows:
1. Assume that Altair Accelerator is installed at D:\rtda with the current release being 2019.01. The D:\rtda\2019.01\patches directory is the one that is needed. If D:\rtda\2019.01\patches directory exists, then use it. If the patches directory needs to be created, complete the following:
```
c:\> D:
d:\> cd \rtda\2019.01
d:\> mkdir  patches 
```

Download the Files

Access the Altair Marketplace and select the product to install.
Log in using the account you set up as part of the pre-installation planning steps.
Click the link for the release version you want, and download the appropriate files.
Using your worklist, download each patch file on the list from the "patch" directory of the web page, and place that file into the patches directory. Note the exact file name of each downloaded software update patch file and write it down next to the descriptive name. You will need that precise file name for the next step in the process.

You do not need to expand the downloaded patch file you just placed within the patches directory. The install-patch process, which you will do next, expects the patch files to be those that were downloaded.