Error: Failed to solve. - User parameter formula as driving dimension.

nalfeindo — Sun, 23 Jan 2022 00:30:24 GMT

Hi,

I struggle with creating a sketch, where one of the driving dimensions simply will not accept a user parameter, no matter what I try. See the file attached.

The user parameter Phi2_L1 uses a formula, which takes in a certain value in degrees, multiplies it by a factor and calculates arcsin of the result. Namely:

Phi2_L1 = asin(L1_refr_ind / Air_refr_ind * sin(d32))

, where d32 is an independent, driven dimension and L1_refr_ind / Air_refr_ind are some values defined by user.

The result is calculated correctly in the Parameters table, and everything works well here. But the moment I try to use it as a driving dimension in a sketch, I get the dreaded "Error: Failed to solve. Please try revising dimensions or constraints." message.

What should I do? Is that a bug? Or have I done something wrong?

I am trying to create a Snell's law of refraction simulation for my students, who are currently trying to 3d print their own telescopes. But without this one driven dimension it's not going to work 😞

Any help would be greatly appreciated!

Re: Error: Failed to solve. - User parameter formula as driving dimension.

nalfeindo — Sun, 23 Jan 2022 00:33:07 GMT

Also, here is my screencast showcasing the issue:

https://knowledge.autodesk.com/community/screencast/96928a01-88be-4ebf-91ba-b20ad82a490b

Re: Error: Failed to solve. - User parameter formula as driving dimension.

bharamk — Mon, 24 Jan 2022 05:27:44 GMT

Thanks @nalfeindo for reporting this. we have Logged FUS-97573 for further investigation.

topic Re: Error: Failed to solve. - User parameter formula as driving dimension. in Fusion Support Forum

Error: Failed to solve. - User parameter formula as driving dimension.

Re: Error: Failed to solve. - User parameter formula as driving dimension.

Re: Error: Failed to solve. - User parameter formula as driving dimension.