It’d help with debugging if you also upload a Grasshopper file that demonstrates the error.
On a sidenote, I’d highly recommend implementing MIConvexHull for computing fast, clean and stable 2D/3D convex hulls. I’ve been using that on several projects recently (including this one), where the standard Grasshopper convex hull solver would fail. Here’s a quick example that should work if you unzip the MIConvexHull.dll to the default Grasshopper libraries folder:
230425_ConvexHull3D_MIConvexHull_GHPython_00.gh (4.5 KB)
MIConvexHull.zip (15.9 KB)