Here is one approach that might work. It requires some knowledge of block masking.
Create a subsystem. Inside the subsystem, place a constant block connected to an output port. Set the value of the constant block to be "K"
Mask the subsystem
Edit the subsystem mask. Add 3 "Edit" parameters. 1 for the bus name, the second for the bus element name. The third should have the name "K" and uncheck the "Visible" box.
On the mask "Initialization", add code that:
Creates an instance of the bus specified in the first parameter
Searches the bus to find the bus element specified by the second parameter
Sets the workspace mask variable "K" created in step 3 to be the min or max value of the bus element
This error message is expected since the Bus Selector inside the Configurable Subsystem expects the bus specified by the bus object.
To avoid receiving this error, use a block such as a Bus Creator or an Inport, in the new model to generate the appropriate bus and feed the Configurable Subsystem.
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