File Association

[ChuckN]

We run two versions of an application. Lets say Ver 7 and Ver. 8. On most
computes in the office (all running Vista), using a right click, I can
choose the version I want to run using "Open With". On one workstation
running Vista, it will only allow me to run one version or the other based
on file association. I can successfully run either version from its own
startup icon.

When I go to Open With the last version installed shows up as a Recommended
Programs. When I select Other Programs, the "other version" does not show
up. When I browse for the program and select it, normally it would be added
to the list of Other Programs. In this case, it never shows up.

To try to fix this, I ran a repair routine on the version that was not
registering. That version now becomes the default, and the other version
will not show up in Open With.


On all other computers, both versions show up as Recommended Programs under
Open with.

What could be blocking file association on this one computer? All of the
subject workstations are about one year old and are all the same make and
model. There are no differences that I am aware of.

Thanks

 

[zachd [MSFT]]

The OpenWith system generally uses application name as the atomic unit of
separation, so if Ver7 and Ver8 have the same application binary name,
they'd collide like that. If you have an existing progid handler for each
version you could then use HKCR\.ext\openwithprogids to bring each in, if I
recall correctly.