Consider a function


where g[x,y,z] is some function. The function f[x,y] is smooth and works perfectly when Plot it. However, when using


I got the message

Throw::nocatch: Uncaught Throw[-Holonomic`DifferentialRootReduceDump`y[NIntegrate`LevinRuleDump`x]+(Holonomic`DifferentialRootReduceDump`y^\[Prime])[NIntegrate`LevinRuleDump`x],NIntegrate`LevinRuleDump`FastLookupHolonomicDifferentialEquation] returned to top level.

I tried to remove it by modifying


I got that 1.1*10^x is not a valid limit of integration.

What is the problem with this RegionPlot?

  • $\begingroup$ Have you done Clear[f] before the second definition of f? You can check with ?f whether the first definition (the f[x_,y_]:= one) is still lingering around. $\endgroup$ – Roman May 14 '19 at 9:24
  • $\begingroup$ Try `ContourPlot´ $\endgroup$ – Ulrich Neumann May 14 '19 at 9:50

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