Struggling with what seems like it should be a simple solve block

Forum|Forum|1 year ago
March 28, 2025
2 replies
1034 views

Hello,

I'm working in Mathcad Prime 10

I am struggling to get a solve block working. I'm attempting to calculate a grid convergence index based on a published guidance document, and it requires an iterative approach which I thought could be executed by a solve block. I'm receiving various errors (see one in the image below) depending on what I try. I have attached my current workbook. Thanks for any help you can provide.

1_GCI-Calculation.zip

Best answer by rgunwaldsen

1. q() is a functon and should be defined outside solve block.

2. ln() is a function and requres (postive) arguement.

3. "Parameterize" solve block with guess value to get p.

4. Use function q(p) to get q.

Prime 10 file attached.

L

LucMeekes

23-Emerald IV

Change the all occurrences of

q(p)

to

q

and see how that helps

Success!
Luc

A

AL_13142368

Author

1-Visitor

Thanks for the suggestion. I've made that change and there's still an error, but the error message is different. It used to say "Initial guess must consist of numbers and matrices" and it now says "This value must be a scalar or a matrix."