Dear Anna, lowering the precision doesn't affect on the warning message, I tried to calculate with eps = 1e-3 the same result. The integral must be converged...After this warning it gives the result of calculation, it seems to be correct, but now I'm not sure about this...
***
TF3 *dis = new TF3("intgr", tr, 0,50, 0, 1, 0, 20,3);
dis->SetParameters(par1,par2,par3);
return dis->Integral(0, 50, 0, 1, 0, 20, 1e-3);
***
Warning in <TF3::Integral>: failed code=1, minpts=33, maxpts=10000, epsilon=0.001, nfnevl=9999, relerr=0.00256295
***
Another thoughts?
Andrew.
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