The recent update to Mac OS X (Yosemite) causes the MATLAB R2012a MCR to stop working, which is needed to run SVReg and BDP. This can be fixed with three simple steps.
If you are using these tools on Mac OS X 10.10 Yosemite, please visit this page: https://brainsuite.org/quickstart/installation/mac/yosemite/ for instructions on how to fix this issue.