[Coin-lpsolver] Creating ClpModel

[Kyle Ellrott]

I'm currently trying to use CoinBuild to create a matrix for Clp.

With
CoinBuild  matrix_build;
I call

matrix_build.addCol(vec_insert_count, vec_insert_pos, vec_insert_val, 
0, 1, obj_func_val[i] );

about 1577745 times while sticking in different vec_insert_pos, and 
vec_insert_val values.

Then I call

ClpModel  clp_mod;
clp_mod.addColumns(matrix_build);
clp_mod.writeMps("out");

The program dies in the writeMps call, because of a EXC_BAD_ACCESS in 
__bigcopy.  Gdb reports the error coming from

COIN/include/CoinPackedMatrix.hpp:106
106         inline const int * getVectorLengths() const { return 
length_; }


Have I forgotten to setup some value that is needed before I can call 
writeMps?

Thanks,

Kyle