While using the 2.5.9 version of OsNavigator, I can write successfully .tcl files but I can not run Opensees. I checked the Opensees Path. This is what command window of MATLAB says:
Error using load File name is empty.
Error in GUI_RunOpenSees
Error in RunOpenSees
Error while evaluating PushTool ClickedCallback.
If I try to run the same model with 2.5.8 version of OSNavigator I have no problems.