EGEN,[<itim>],<ninc1>,<e1>,[<e2>],[<inc>],[<ee>]
generates elements by copying a pattern of elements, where:
<itim> total number of element sets to be generated not including original pattern (default: 1)
<ninc1> increment to be applied to node numbers for each element set
<e1> first pattern element
<e2> last patten element (default: <e1>)
<inc> pattern step (default: 1)
<ee> first element number of the generated elements (default: Max element number +1)