The SetParameterEquation command sets the equation associated with the specified parameter to the given equation.

$\mathrm{with}\left(\mathrm{CAD}\left[\mathrm{Inventor}\right]\right)\:$

$\mathrm{OpenConnection}\left(\right)\:$

$\mathrm{doc}≔\mathrm{GetActiveDocument}\left(\right)\:$

$\mathrm{SetParameterEquation}\left(\mathrm{doc}\,''d1''\,''d1\; =\; p1\; *\; 4\; ul''\right)$

$\mathrm{CloseConnection}\left(\right)\:$