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EXAMPLE 4.1
NN NE NM NDIM NEN NDN
 4  4  1  2    2   2
ND NL  NMPC
 5  2   0
Node#  X   Y
 1     0   0
 2    40   0
 3    40  30
 4     0  30
Elem#  N1  N2  Mat#  Area  TempRise 
 1      1   2   1     1     0
 2      3   2   1     1     0
 3      3   1   1     1     0
 4      4   3   1     1     0
DOF#  Displacement
 1     0
 2     0
 4     0
 7     0
 8     0
DOF#  Load
 3     20000
 6    -25000
MAT#   E      Alpha
 1    29.5E6  12E-6
B1  i  B2 j  B3  (Multi-point constr. B1*Qi+B2*Qj=B3)