Actually, INCREASING the "Skinning Max Distance" solved the problem!
Which I guess makes sense: I'm scaling a small (around 1 unit) mesh up to 8x it's original size, so some vertex are probably going to be more than 0.5 units from any cluster, meaning the vertex is not being influenced by any clusters causing no weights to be assigned to it, which leads to the error.
When I increased the "Skinning Max Distance" to 2, the error went away.
Thanks for steering me towards what the issue might be related to!
BTW, the updated version of "ObiSoftbodySkinner.cs" did not remedy my particular issue.
Which I guess makes sense: I'm scaling a small (around 1 unit) mesh up to 8x it's original size, so some vertex are probably going to be more than 0.5 units from any cluster, meaning the vertex is not being influenced by any clusters causing no weights to be assigned to it, which leads to the error.
When I increased the "Skinning Max Distance" to 2, the error went away.
Thanks for steering me towards what the issue might be related to!
BTW, the updated version of "ObiSoftbodySkinner.cs" did not remedy my particular issue.