Passing and defining clusters

Hello Labview forum,
I wish to pass a cluster of input parameters to a number of different subVIs. However, whenever I change my mind of the cluster composition, add another element, I have to go the all the subVIs that use it and redefine it there too.
Is there a way to get around this so I only have to redefine the cluster once?
I can think of 2 possible ways of achieving this but am not sure how or whether labview does them?
1) Define a a cluster in a central location. All subVIs look at this definition.
2) Pass the cluster by reference and the subVIs can then unbundle components by name.
Any ideas?
Regards,
Jamie
Using Labview version 8.0

Jamieg wrote:
Thanks tbd,
I have create 2 typedef controls for 2 different clusters I have.
However, one of them has undesirable behaviour and I don't know why.
When I load the VI, cluster A's elements are all set to 0 instead of my default values. Also, if I change the values and save the VI, the cluster's values get reset to 0. In the saved control the cluster has the desired default values so this isn't the problem's cause.
Also, the VI now always has an asterix in the title bar, usually indicating changes have been made since the last save. However, even after I click save, the asterix is still there.
On the other hand, cluster B has my desired qualities where it remembers default values and loads to them.
How can I fix cluster A?
Regards,
Jamie
PS
Another bit of strange behaviour I noticed was when I right click on the control in the VI front panel, there is the option to open the typedef. However, if I have already opened the typedef for the other cluster control, then the option is no longer available.
The default data is associated with the VI not with the typedef. You usually don't want the default data to change in all VIs when you make modifications to the typedef. But as Dr. Ivel said there has been a bug in older LabVIEW versions where modifying the cluster typedef made all controls loose their default data and return to LabVIEW's default default data. Means they revert to empty strings, 0 for numbers, etc.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

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Message was edited by: LutherBaker

LutherBaker wrote:
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