When I use WolframLibraryData to initialize the MTensor now, I have solved the crash bug. Only the memory leak noted by Ben Izd still exists
Needs["CCompilerDriver`"]
lib=CCompilerDriver`CreateLibrary["
#include<vector>
#include \"WolframRTL.h\"
using namespace std;
struct ManagedArray {
MT...
@dtn I suggest 2 modifications in your code: (1) Move the definitions of h and f[x_] before you use them and (2) it is the plotting of ddddf that causes the bumpy display so just deal with that by removing the plotting of f[x] and Evaluate[D[f[x], {x, n}]].
You can add those back in once you've determined the solution. The following code works for me: `Remove[f, n, h]; n = 4; h = 1/10000; f[x_] := 1/10 Sin[3 x] Exp[-x] x; ddddf = 1/h^n Sum[(-1)^(k + n) Binomial[n, k] f[x + k h], {k, 0, n}]; Plot[ddddf, {x, 0, 5}, PlotRange -> All, WorkingPrecision -> 20]`.
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When I use WolframLibraryData to initialize the MTensor now, I have solved the crash bug. Only the memory leak noted by Ben Izd still exists
Needs["CCompilerDriver`"]
lib=CCompilerDriver`CreateLibrary["
#include<vector>
#include \"WolframRTL.h\"
using namespace std;
struct ManagedArray {
MT...
