Undefined variable and explicit all

Forum|Forum|3 years ago
March 16, 2023
2 replies
4511 views

Hi!

I am experiencing an error that states: This variable is undefined, even though it is.

What is the problem here?

I am running Prime 8.

/Frederik

1_mathcad-El-Autorisationsprøve-skabelon-med-formler.zip

Mathcad Usage

Best answer by RantEng

I've been caught on this one before. First on the Calculation Tab under Calculation Options, activate "Units/Constants in Symbolics". Then in the same tab, hit Calculate.

I have made that change to your document and entered some dummy values. It works now.

Bob

R

RantEng

Answer

14-Alexandrite

I've been caught on this one before. First on the Calculation Tab under Calculation Options, activate "Units/Constants in Symbolics". Then in the same tab, hit Calculate.

I have made that change to your document and entered some dummy values. It works now.

Bob

1_mathcad-El-Autorisationsprøve-skabelon-med-formler.zip

F

FH_10621200

Author

3-Newcomer

Hi Bob!

Wow, thanks for a quick answer. It did solve SOME problem. But now a new one occurs.. "This value must be real"

Thats what it ways when I input data to the variables.

Please see the attached screenshot, its from page 2/7 in the worksheet.

I hope you can figure it out, i believe in you!

/Frederik

W

Werner_E

25-Diamond I

The problem is the acos() expression you use. With the values provided, the argument is greater than 1 (1.15) and so the angle is non-real. You have to provide a real angel, hence the error.