One View in multiple Windows

Question

Hi,
This is rather a note than a question and written purely in the hope of Google finding it if I (or someone else) ever need it again:
Situation: (V = view; W = window)
is displaying a table
has a view container with embedded in it
opens as a popup
contains
also has a view container with embedded in it
contains
--> as a picture: [Link to ImageShack|http://imageshack.us/photo/my-images/684/constellation.png/]
in words:
A view showing a table is used in two other views . One of the using views is called in a popup window by the other using view .
What happens in this situation is a dump with this error message in the browser:
View Is Already Displayed in Window of Component {..}
Details:
As the error message says, may not be displayed by two windows at the same time. One might think that not displaying by making it invisible (either by using a parent container or other suitable element) should solve the problem...
Let me tell you before: IT DOES NOT!
Solution:
To really "hide" you need to display a different view instead of it in its View Container element.
The easiest way to do this is to add an EmptyView to the ViewContainer in , together with plugs to call the EmptyView and seperately.
Now you have to fire the plug for the EmptyView just before opening the popup . After closing the popup you have to fire the plug for . -> Voila, the same view is used in both windows!
Negatives:
1. Obviously you really cannot show the view in both windows at the same time, but as a popup with more than a yes/no question usually hides most things below it, this should not be the biggest issue.
2. When firing the plug for the view is built anew, meaning the whole WDDOINIT, ... running. Apart from having impact on your implementation of these methods, this might also be a pain in respect to performance.
Hope this helps! If anyone has helpful comments or wants to create a picture for the solution, please post!
Kind Regards
Robert Schulz

Answer 1

Finally got it-
This is a new security feature added in version 9.3.3.
Currently, when /workspace and /workspace/index.jsp commands are issued, a new instance of EPM Workspace is launched in a separate browser window. With the single instance feature, subsequent invocations of /workspace/ and /workspace/index.jsp opens items in EPM Workspace tabs, even when launched from an external URL. Single instance also prevents extra EPM Workspace windows from closing existing session(s) where multiple EPM Workspace windows were previously allowed.
URL Parameter to Override Single Instance Behavior:
By default, there can only be one instance of EPM Workspace on a client machine. However, there are instances where multiple sessions of EPM Workspace must remain open. For example, Financial Management may need to do a side by side comparison of applications. You can override the default setting to allow multiple window names with the URL parameter, multi_process=true appended to the EPM Workspace URL.
TL;DR Use /workspace/index.jsp?multi_process=true to utilize multiple sessions of Workspace.