FAQ

 

Q:    Does POSSIM conduct full load flow calculations?

A:    No.  There are already many excellent packages out there that do this very well.  POSSIM provides an interface to such packages (an interface to MATLAB SimPowerSystems exists, and interfaces to DIgSILENT and OpenDSS are planned).  Algorithms that are implemented in POSSIM can then be tested across a variety of load flow packages, depending on availability and interest.

 

Q:    I want to use power flow software other than that currently supported by POSSIM.  How can I do that?

A:    You will need to write your own LoadFlowInterface.  Please check the documentation describing how to do this.

 

Q:   I get the error Trying to start MATLAB ...matlab: Command not found.  Fail!

A:    You need to make sure MATLAB is on the path.  E.g. on a Mac, use export PATH=/Applications/MATLAB_R2012a.app/bin:$PATH (obviously, replaying with your own computer's path).

 

Q:   I get the output Trying to start MATLAB ... Fail!

A:   This means the MATLAB engine may not be opening properly.  MATLAB needs a C shell (see here), so make sure you have csh installed.  (On linux this is simply done with:  $ sudo apt-get install csh).

 

Q:   When starting matlab, I get the message .../bin/matlab: 1: .../bin/util/oscheck.sh: /lib/libc.so.6: not found

A:   This appears to be a problem with recent installations of matlab and ubuntu (see here); try adding a symbolic link to your c library.

 

Q:    I get the error: dyld: Library not loaded: @rpath/libeng.dylib  (Mac)

A:     You need to make sure your dynamic library path includes the necessary matlab libraries.  For example on a Mac, use: export DYLD_LIBRARY_PATH=/Applications/MATLAB_R2012a.app/bin/maci64/:$DYLD_LIBRARY_PATH (obviously, replacing with your own computer's path).

 

Q:   I get the error No rule to make target ‘.../libmx’ needed by ‘possim’. (Linux)

A:   You need to make sure your runtime library path includes matlab libraries.  Try: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:matlab/bin/glnxa64 (obviously, replace with your own computer's path to matlab).