Dear all, I've expected the following error using latest git on Ubuntu linux when trying to update a matrix in a matrices object by referencing to itself (updating itself). This works fine with a matrix object but not with a matrix within a matrices object. <hansl> matrix m = mnormal(10,2) matrices Mtmp = defarray(m[,1], m[,2]) # define temp. matrices matrices M = array(nelem(Mtmp)) # matrices of interest # update each matrix in matrices M loop j=1..nelem(Mtmp) -q M[j] ~= Mtmp[j] # grab last version of j-th matrix in ret M[j] = M[j] # update j-th matrix in ret # results in ERROR endloop </hansl> Best, Artur