How to Debug an invalid handle.

I am really new to Simulink and so I just don't know how to begin solving this. I have a model that was running successfully until Windows 7 decided to install an update to the operating system on Wednesday evening. Now I have two repeating errors.

Object parameter contains an invalid handle.

and

Error using sf Object parameter contains an invalid handle.

When I select the errors, no specific item is highlighted in the model.

I have ho idea how to even begin solving this.

In the MatLab Command window when I try and run the model I get these errors.

An unloaded non-library model with Stateflow components was found. Ignoring... Bad object handle (1911) at index 1. Error in parameter number 2. Bad object handle (1911) at index 1. Error in parameter number 2. Bad object handle (1911) at index 1. Error in parameter number 2.

Thanks for any help.

[Kaustubha Govind]

Paul: You may want to send your model over to MathWorks Tech Support to see if they can reproduce/resolve this.

Answer 1

[Tommie Heard]

This is how to debug an invalid handle. Before running your code from the command line enter: dbstop if error

When the program stops began backtracking the handle object to see when it was good. Notice which code was executed when the handle became invalid.

This usually happens b/c the object has been deleted or closed unbeknowingly.

Give it a try.

THeard