'Failure to calculate log density' error occuring during 'run_model()' function

[SawyerHilt]

Hi all,

I've been trying to try out MixSIAR to produce a mixing model and am stuck on this error.

I have used the debug function to try and trace this error in the run_model() function, and it looks like it has something to do with the mix data I am using.. I have attached a screenshot below of the mixture data I am using in this model, as I can't really imagine what could be causing the problem here...

Any help would be greatly appreciated!
Thanks.