title: Problem with initialization bim's ready example in Octave
body: <p>On assignment, they gave me a step-by-step example from this article <a href="http://wiki.octave.org/Bim_package" rel="nofollow noreferrer">http://wiki.octave.org/Bim_package</a>.</p>
  <p>The example was typed manually, without copy-paste.I already install this packages-   fpl, bim,msh, image.
  Octave example:</p>
  <pre><code>pkg load bim
  pkg load msh
  pkg load fpl
  
  
  [mesh]=msh2m_gmsh(&quot;fuime&quot;,&quot;scale&quot;,1,&quot;clscale&quot;,.1); – Error
  [mesh]=bim2c_mesh_properties(mesh);
  
  pdemesh(mesh.p,mesh.e,mesh.t);
  view(2)
  
  xu=mesh.p(1,:).';
  yu=mesh.p(2,:).';
  
  nelems=columns(mesh.t);
  nnodes=columns(mesh.p);
  
  epsilon=.1;
  phi=xu+yu;
  
  AdvDiff=bim2a_advaction_diffusion(mesh,epsilon,1,1,phi);
  Mass=bim2a_reaction(mesh,1,1);
  b=bim2a_rhs(mesh,f,g);
  A=AdvDiff+Mass;
  
  GammaD=bim2c_unknowns_on_side(mesh,[1 2]);
  GammaN=bim2c_unknowns_on_side(mesh,[3 4]);
  GammaN=setdiff(GammaN,GammaD);
  
  jn=zeros(length(GammaN),1);
  ud=3*xu;
  Omega=setdiff(1:nnodes,union(GammaD,GammaN));
  
  Add=A(GammaD,GammaD);
  Adn=A(GammaD,GammaN);
  Adi=A(GammaD,Omega);
  
  And=A(GammaN,GammaD);
  Ann=A(GammaN,GammaN);
  Ani=A(GammaN,Omega);
  
  Aid=A(Omega,GammaD);
  Ain=A(Omega,GammaN);
  Aii=A(Omega,Omega);
  
  bd=b(GammaD);
  bn=b(GammaN);
  bi=b(Omega);
  
  temp=[Ann Ani;Ain Aii]\[jn+bn-And*ud(GammaD); bi-Aid*ud(GammaD)];
  u=ud;
  u(GammaN)=temp(1:numel(GammaN));
  u(Omega)=temp(length(GammaN)+1:end);
  
  jd=[Add Adi Adn]*u([GammaD;Omega;GammaN])-bd;
  
  [gx,gy]=bim2c_pde_gradient(mesh,u);
  [jxglob,jyglob]=bim2c_global_flux(mesh,u,epsilon*ones(nelems,1),ones(nnodes,1),ones(nnodes,1),phi);
  
  fpl_vtk_write_field(&quot;vtkdata&quot;,mesh,{u,&quot;Solution&quot;},{[gx:gy]',&quot;Gradient&quot;},1);
  pdesurf(mesh.p,mesh.t,u);
  </code></pre>
  <p>In this - <code>[mesh]=msh2m_gmsh(&quot;fuime&quot;,&quot;scale&quot;,1,&quot;clscale&quot;,.1);</code>Error</p>
  <pre><code>Generating mesh...
  error: 'tmpnam' undefined near line 78, column 78
  error: called from
      msh2m_gmsh at line 78 column 12
  &gt;&gt;
  </code></pre>
  <p><strong>WHAT HAVE I TAKEN TO FIX THE ERROR</strong></p>
  <p>I decided that the problem is in uninstalled packages.
  According to the answer I was given in this thread <a href="https://stackoverflow.com/questions/67586887/error-when-installing-a-new-package-in-octave">Error,when installing a new package in Octave</a>.</p>
  <p>I started to install the package mesh, but here another error came out.</p>
  <pre><code>error: get_forge_pkg: package not found: &quot;mesh&quot;.  Maybe you meant &quot;lssa?&quot;
  error: called from
      get_forge_pkg at line 90 column 5
      get_forge_download at line 32 column 14
      pkg at line 500 column 31
  </code></pre>
  <p>But the mesh package not found.The package msh already installed.
  How I can fixed my problem?</p>