MATLAB: Parfor cannot run due to the way the variable ‘Adj_Load_Mat’ is used

finite element assemblyparfor

Hello,
I am trying to run the following parfor loop, but I keep getting an error. The error message says "parfor cannot run due to the way the variable 'Adj_Load_Mat' is used." Any workaround is highly appreciated. 
    Adj_Load_Mat=zeros(tne,ndof);
    parfor iel=1:tne
            dof=dof2(iel,:);
            Adj_Load_Mat(iel,dof)=(Ad_Load_e(iel,:))';
    end
    Adj_Load=sum(Adj_Load_Mat,1);
The arrays 'Ad_Load_e' and 'dof2' are calculated at previous steps.
Thanks in advance

Best Answer

Try
Adj_Load_Mat=zeros(tne,ndof);
    parfor iel=1:tne
            dof=dof2(iel,:);
            local_Adj = Adj_Load_Mat(iel, :);
            %it has to end up as column the transpose portion of ' must be
            %irrelevant so you must have used ' to indicate conjugate
            local_Adj(dof) = conj(Ad_Load_e(iel, :));
            Adj_Load_Mat(iel,:) = local_Adj;
    end
    Adj_Load=sum(Adj_Load_Mat,1);
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