Skip to main content
1-Visitor
June 11, 2012
Question

Constant must be 3 element vector

  • June 11, 2012
  • 7 replies
  • 5041 views

In the last two or three weeks, when I multiply by a constant I receive an error message saying the constant must be a 3 element vector.

Example: d = D - 2 x t
d - ID
D - OD
t - wall thickness
error message states that 2 must be a 3 element vector
I have had to abandon my last three Mathcad calcs because of this error.
Thanks for any help or suggestions.
Jack Smith PE
Stress Engineering Services

7 replies

23-Emerald V
June 11, 2012

What version of Mathcad are you using? Can you post a short worksheet that shows the problem (this will both help a reviewer spot any problem and check whether it can be replicated (thus pointing to either your installation or a generic Mathcad problem)?

Stuart

1-Visitor
June 11, 2012

Mathcad 14.0 M020 (14.0.2.5 [802141434])

19-Tanzanite
June 11, 2012

The operator you are using is the cross product operator, which only works with 3-element vectors. Use the dot product, which you get by typing "*".

24-Ruby IV
June 11, 2012

Hello,

Please attach your Mathcad worksheet to the message (by using "Use advanced editor").