Occasionally analyses obtain bending moments below the wall and very erratic results e.g. for total stresses

If the wall elements are very short and stiff, the program will not compute the stresses / bending moments accurately from the displacements. The problem can usually be overcome by increasing the distance between nodes. Also please make sure that spacing between the nodes does not vary greatly(max spacing to min spacing ratio should be typically limited to  around 2). The problem was particularly severe in DOS Frew and versions before 17.8.6 which had single precision calculations.

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