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GrantChandler1-Visitor
1-Visitor
November 23, 2010
Question

Error: should not happen (3,1)

  • November 23, 2010
  • 1 reply
  • 4870 views

I'm getting an error that I can't figure out at all. I'm trying to invert a 4x4 matrix. All of the terms in the matrix are 3x3 matrices except for the m's are constants; hence, a 12x12 matrix.

Error.jpg

1 reply

R
RichardJ19-Tanzanite
19-Tanzanite
November 23, 2010

Which version of Mathcad (including service releases)?

Please also post the worksheet that shows the problem.

G
GrantChandler1-VisitorAuthor
1-Visitor
November 23, 2010

Mathcad 14.0 M020 (14.0.2.5 [802141434])

G
GrantChandler1-VisitorAuthor
1-Visitor
November 23, 2010

It seems like the problem might stem from nesting the matrices and then trying to take the invese as if a 12x12 matrix. I've upload my sheet. Culprit is on the bottom of the 3rd page.

Also, a simpler version illustraiting the point is attached.

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