From Eddy Offermann:  A clear Error message has been added when a matrix inversion fails .
From Eddy Offermann:
 A clear Error message has been added when a matrix inversion fails .


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@16470 27541ba8-7e3a-0410-8455-c3a389f83636

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