MATLAB: Are the library blocks unable to propagate the changes in Simulink

blockschangediagramlibrarylinksimulinkupdate

I have a custom Simulink library containing blocks that are linked to each other. I made modifications to one of the referenced blocks, however, after restoring the link, the changes do not propagate to the rest of the referenced blocks. In particular, the following are the steps I took:

1. Open a custom library and unlock it

2. Disable the link of one the referenced blocks

3. Modify the model

4. Restore the link.

At this point, notice that the change is reflected in the main library block and one of the referenced blocks. However, the other referenced block remain unchanged. The changes are only reflected when I manually select the referenced block and choose the "go to library block" option, or save, close and re-open the library file.

Best Answer

This is an intended behavior for libraries in Simulink. The update diagram facility for libraries is disabled and the links are not constantly updated. However, before each model simulation, Simulink will ensure that the model receives the latest link version and thus contains the latest changes to the library.

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MATLAB: Can the Model Reference block become a linked library block in Simulink

This bug has been fixed in Release 2007a (R2007a). For previous product releases, read below for any possible workarounds:

Simulink does not allow you to create a linked library from a Model block. Only subsystems and masked blocks can become linked library blocks. Model Reference blocks are not either of these type of blocks.

To work around this issue, you can consider either of the following options:

1. Put the model block into a subsystem block for the purpose of making that subsystem a library block.

This creates a subsystem wrapper that can then be a linked library block.

2. Mask the Model Reference block via:

set_param(gcb,'Mask','on')

This will then allow the Model Block to be a linked library block, since it becomes a masked block.

MATLAB: Error While Propagating Size

Have you tried editing the size of output in the edit data portion of MATLAB function?

1) Open the MATLAB function in MATLAB Editor 2) Click on the Edit Data tab in the top right next to the build model icon 3) In the Ports and Data manager tab that opens up edit the output variable's size to match what you need it to be or try making it variable size.

If this does not help, sharing files that reproduce your error will be of help

Best Answer

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MATLAB: Can the Model Reference block become a linked library block in Simulink

MATLAB: Error While Propagating Size

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