You can specify several conditions for a flow bundle. You can combine these conditions using AND THEN and OR. This means that you could e.g. combine PrT and PuT conditions (Fundamentals: Combining flow bundle criteria).
Linking flow bundle conditions with AND THEN
This flow bundle describes all paths from origin to destination which traverse all marked network objects in exactly the order in which they were marked.
In the following example, the filter determines the volumes of the links listed in the Graphics tools (Flow bundle) window.
1. On the Graphics menu, click Flow bundle.
The Graphics tools (Flow bundle) window opens.
2. Select the desired traffic type below Term type.
3. Select the network object type Link.
4. In the network, click on the desired link.
The selected object is shown in the table in the Graphics tools (Flow bundle) window with the listed First link.
5. In the network, click the next desired link.
The Graphics tools (Flow bundle) window lists the object and connects it with the previous object via the And then term.
6. If required, select further objects for the flow bundle to traverse.
7. If required, make further changes in the Graphics tools (Flow bundle) window (Inserting a flow bundle).
8. Click the Execute icon 
.
The volumes on the paths which traverse all selected links are determined.
Putting AND THEN flow bundle conditions into brackets
To ensure that the flow bundle is calculated correctly, you can put the flow bundle conditions into brackets.
Brackets can only be set if at least three rows with flow bundle conditions have been defined and at least two of them are linked by And then. Nested brackets cannot be defined.
1. Make sure that the Graphics tools (Flow bundle) window is open and at least three flow bundle conditions have been defined.
2. In the Graphics tools (Flow bundle) window, select the rows you want to put in brackets. To do so, hold down the Ctrl button and successively click on at least two entries listed below one another in the Condition column.
The rows with the flow bundle conditions are highlighted.
3. Click the Set brackets symbol 
.
4. If needed, click on the entry And then in the Combination column to change it to the opposite And then not. The change applies to the entire term in brackets. You cannot change the current settings for individual elements within the brackets.
The selected flow bundle conditions are placed in brackets and the brackets are shown in the Condition column of the corresponding rows.
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Tips: To remove the brackets, mark one of the conditions and click the To shift a bracket up or down, mark the desired row and click the |
or 
symbol.Combining flow bundle conditions with an OR term
If you insert an OR term, the series of AND THEN terms ends. You can then add additional conditions. A flow bundle describes all paths that fulfill at least one of the filter conditions linked to an OR operation.
In the following example we search for paths which either traverse two selected stops or nodes.
1. On the Graphics menu, click Flow bundle.
The Graphics tools (Flow bundle) window opens.
2. Select the desired traffic type below Term type.
3. Select the desired network object type.
4. Select the two network objects for the first condition in the network.
5. Click the 
New set of conditions symbol.
An OR link is inserted in the Graphics tools (Flow bundle) window.
6. Select the two network objects for the second condition in the network.
7. If required, make further changes in the Graphics tools (Flow bundle) window (Inserting a flow bundle).
8. Click the Execute symbol .
The paths are calculated and displayed as flow bundle.
