Why do I get an error when I run a block replacement script for my model in Simulink Design Verifier 1.4 (R2009a)?

I have a model where I am trying to replace all the unit delay blocks with memory blocks. I have written a block replacement script and a custom rule for the Simulink Design Verifier.

When I run this script I get the following error:

 ??? Error using ==> BlkReplacer.executeReplacements at 104

 Cannot apply block replacements to model 'expt5' due to unsaved changes

 Error in ==> sldvblockreplacement at 38

     [status, modelH, msg] = blockRepObj.executeReplacements(obj,opts,showUI);

 Error in ==> replace_mem at 11

 [status, newmodelH] = sldvblockreplacement(system_name, options);

I am wondering how to resolve this issue. I have saved my model before I run the script.

Answer 1

[MathWorks Support Team]

As the error message suggest the issue is that the model has unsaved changes. It is the replacement script that makes changes to the model.

Following is an excerpt from the replacement script.

options = sldvoptions(system_name); 

options.BlockReplacement = 'on';

options.BlockReplacementRulesList = '<FactoryDefaultRules>, customrule_integrator_memory';

newmodelname = ['new' system_name];

[status, newmodelH] = sldvblockreplacement(system_name, options);

The 'options' structure is the one which shows up in the Configuration Parameters. When the second line is executed the script is making change to the configuration parameters. Therefore the model has unsaved changes.

Adding the following line of code before modifying the options structure resolves the issue:

options = options.deepCopy;

The above command makes a local copy of the options structure and does not make any changes to the model.