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Albert Retey has demonstrated in a similar situation that you can use "EventLocator" to detect an event in NDSolve. For example: eqn = {\!\( \*SubscriptBox[\(∂\), \(t\)]\(u[t, x]\)\) == 1/100 \!\( \*SubscriptBox[\(∂\), \(x, x\)]\(u[t, x]\)\) - u[t, x] \!\( \*SubscriptBox[\(∂\), \(x\)]\(u[t, x]\)\), u[0, x] == Sin[2 π x], u[t, 0] == u[t, 1]}; ...


A method is to write a message handler, like in this answer. The handler is passed an argument of the form Hold[Message[...], boolean] where the boolean tells the handler if the message is to be displayed, or not. Since you are looking to capture the info passed to NDSolve::ndsz, I would write the handler like Clear[messageHandler, vals]; vals = {}; ...


Use Mapping multiple parameters of a function to specific values and supply it with the following version of parameters. parameters=Flatten[Table[{a, 1/bInverted}, {a, 1/2, 5, 1/2}, {bInverted, 2, 5}], 1] Update Let's redefine myfunction to be a function of a, b and x. myfunction[a_, b_, x_] := (b/a)*((a/x)^(b + 1)) Now when you generate parameters ...


Activate@Replace[Inactive[f][3],3->1, Infinity] 1 or Replace[Hold@f[3], 3 -> 1, Infinity] // ReleaseHold 1

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