linprog internal error -98@19

After running hundreds of iterations of an optimization problem with random input I suddenly get the error:

LINPROG has stopped because it encountered an internal error. We are sorry for the inconvenience. Please contact technical support for assistance with your problem, quoting the code "-98@19".

Can anyone tell me which problem this code might hint to?

Thanks.

[Alan Weiss]

What did technical support say when you asked them?

Alan Weiss

MATLAB mathematical toolbox documentation