Multiple installation using MSI Instance ID

This topic describes how to choose the MSI instance ID you require for non-interactive multiple installations.

About this task

In order to support non-interactive multiple installations, you need to find out whether the instance ID you want to use is already in use or not and choose the appropriate one. For each installation media (for example, each 7.5 client and 7.5 server), Instance ID 1 is the default ID which is used for single installations. If you want to install alongside Instance ID 1 you need to specify which instance you want to use. If you have already installed instance 1, 2, and 3 then you need to find out what the next available instance is, for instance, Instance ID 4. Similarly, if instance 2 has been removed, you need to find out that there is a gap that can be reused. You can find out which Instance ID is currently in use using the dspmqinst command.

Procedure

Type dspmqinst to find a free MSI Instance in the media being installed by reviewing the MSIMedia and MSIInstanceId values for the versions already installed. For example:

InstName:      Installation1
InstDesc:
Identifier:    2
InstPath:      C:\mq\install1
Version:       7.5.0.0
Primary:       Yes
State:         Available
MSIProdCode:   {0730749B-080D-4A2E-B63D-85CF09AE0EF0}
MSIMedia:      7.5 Server
MSIInstanceId: 1

If MSI Instance ID 1 is in use and you want to use MSI Instance ID 2, the following parameters must be added to the msiexec call:
```
MSINEWINSTANCE=1 TRANSFORMS=:InstanceId2.mst
```

What to do next

For multiple installations, the INSTALLATIONNAME or PGMFOLDER must be supplied as an additional parameter on any non-interactive installation command. Supplying the INSTALLATIONNAME or PGMFOLDER ensures that you do not work with the wrong installation in case you omit or incorrectly specify the TRANSFORMS parameter.