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Custom Code in Subsystems

The location of a Custom Code block in your model determines the location of the code it contains. You can use System Custom Code blocks either at root level or within atomic subsystems; the code is local to the subsystem in which you place the blocks. For example, the System Outputs block places code in mdlOutputs when the code block resides in the root model. If the System Outputs block resides in a triggered or enabled subsystem, however, the code is placed in the subsystem's Outputs function.

The ordering for a triggered or enabled system is

1. Output entry

2. Output exit

3. Update entry

4. Update exit

   Note   If a root model or atomic subsystem does not need to generate a function for which a Custom Code block has been supplied, either the code in the block is not used or an error is generated. There is no diagnostic setting to control this. To eliminate the error, remove the Custom Code block.

Example: Using a Custom Code Block

Preventing User Source Code from Being Deleted from Build Directories

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