Why do I receive an error saying "MCommand 'Copy' Failed" when I copy blocks from the Simulink Library Browser into my model in R2012b?

I am trying to copy a block from the SimPowerSystems/Machines library into a new model, but I receive the following error message:

 MCommand 'Copy' Failed

I'm not sure what is causing this. I can copy blocks from other libraries just fine, and I am sure that I have SimPowerSystems on my license. How can I fix this?

Answer 1

[MathWorks Support Team]

This is likely an issue with the MATLAB path or toolbox cache. To rectify this, please enter the following commands at the MATLAB command line:

restoredefaultpath

rehash toolboxcache