Interpolation Error - Unexpected internal error: Internal matrix not definite

Hi, I have a numeric model that I append to daily with new drilling data. Today I started to get this error and I'm a bit stumped as to the cause. My parameters have been pretty reliable for over a year now.

I'm not seeing any glaring issues with my data either.

Any ideas what could be causing this?

Thanks!

Answers

  • StephanieVanos2
    StephanieVanos2 Posts: 12 mod
    edited March 18

    Hi Scott,

    At a very high level the error means the LF cannot find a sufficient equation with the RBF interpolant to approximate the input data through the bounding box.

    Sometimes changing your surface resolution is enough to fix the issue. You can also try changing the boundary size or resolution slightly or changing the drift setting on the RBF interpolant. Do you have a trend applied? You can also try tweaking the trend slightly.

  • PrachiChitkara
    PrachiChitkara Posts: 423 admin

    @CristhianDavidQuinte @findlayfraser @JamesLally @BenHenderson do any of you know what could be causing this and if there's a way around it?

  • Sorry! not one i've run into before.