Why do I receive warnings about missing GoTo and From blocks when using a IGBT block (and other similiar SimPowerSystems blocks) in my model in R13?

Why do I receive warnings about missing GoTo and From blocks when using a IGBT block (and other similiar SimPowerSystems blocks) in my model in R13?

When I run my model with IGBT or Asynchronous Machine blocks (or other SimPowerSystems blocks), I receive the following warnings at the MATLAB command line:

Warning: Matching "Goto" block for "From" block 'dcbustctrl_igbt/Asynchronous Machine SI Units1/From' not found.

Warning: Matching "From" block for "Goto" block 'dcbustctrl_igbt/Asynchronous Machine SI Units1/Goto' not found.

Warning: Matching "From" block for "Goto" block 'dcbustctrl_igbt/IGBT/Goto' not found.

Warning: Matching "From" block for "Goto" block 'dcbustctrl_igbt/VDC/Goto' not found.

In addition, there is no output from the Machines Maesurement Demux block.

Answer 1

[MathWorks Support Team]

This bug has been fixed for Release 14 (R14). For previous releases, please read below for any possible workarounds:

It would seem that the problem is that SimPowerSystems does not compile for this model. If you look in the Command Window after you start the simulation, you will see that there is no SimPowerSystems compilation message. The fact is that there is no measurement block in the model. The Demux block is not considered as a measurement block.

It may not be evident for the library user to understand this behavior since the documentation does not talk about this limitation. In the previous versions of Power System Blockset, Simulink detected the absence of measurement blocks and a popup warning would appear to the user. Now in SimPowerSystems this feature has been removed.

The solution is to add a dummy voltage measurement in the model. Now SimPowerSystems should compile and there should be no more goto-from warnings. However, the simulation may not start due to a bug with the GTO-IGBT bridge model.

There is an update for this model attached. Please open the blockupdate.mdl and follow the instructions to update this library. Then, please run the modified model.