[octave] 'extname' undefined in OdefySimulation

[carissableker]

When attempting to run a simulation in Octave, the error is thrown:

error: 'extname' undefined near line 80 column 105
error: called from
    OdefySimulation at line 80 column 13

The issue is on the following line (extname is not defined, no other reference is made to it):

Odefy/Odefy-1.20/code/simulation/OdefySimulation.m

Line 80 in c725161

cmd = sprintf('yp = lsode(@(t,y)%s(y,t,simparams,@%s), simstruct.initial'', realtime);',tmpname,extname);