The possibility to handle huge matrix equation?

I'm trying to solve the problem that contains the huge matrix.the Hessian Matrix could be around 4000 *4000.The solver terminated because of EXC_BAD_ACCESS.I wonder if it is my coding error or the limitation of this lib.

No source file or test is named. Start by reproducing the reported EXC_BAD_ACCESS with a roughly 4000 × 4000 Hessian, then determine whether the failure is caused by the caller or by the library. Done means identifying the cause and documenting a supported outcome or a reproducible fix.

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