[R] simplex (boot): solving A2 %*% x >= b2 not possible

[Wolfram Fischer - Z/I/M]

When I want to solve a problem of the form A2 %*% x >= b2
I receive an error message allthough the problem is
solvable:

library(boot)
A <- matrix( c(4,8,8,4), 2, 2 )
b <- c(9,9)
a <- b

simplex( a=a, A2=A, b2=b, maxi=F )
#--
#	Error in rbind(iden(m1), zero(m2 + m3, m1)) : 
#		attempt to set an attribute on NULL


#== IN CONTRAST TO A CORRECT RESULT WHEN CALLING:

simplex(a=a, A1=A, b1=b, maxi=T )
#--
#	Optimal solution has the following values
#	  x1   x2 
#	0.75 0.75 
#	The optimal value of the objective  function is 13.5.


Wolfram Fischer
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