Strange behavior. I don't know if this can be made to work. I replaced an equation with an interpolation object, f(x).
tInt := int(f, 133 .. 134, numeric);
tInt := 324.95206944305 <= Computes a result. I
tInt := int(f, 133 .. 312, numeric);
tInt:= int(fproc, 133. .. 312.) <= Won't compute it. The interpolation object has 3051 points, so that's not the problem. The name "fproc" is not something I have in my code, just the name, "f".
If I try to make the integral just slightly more complex by passing a variable in, it doesn't work at all. This was to see if I could integrate with a varying divisor: f(x)/(x+1)
int(f(x), x = 133 .. 134, numeric);
Error, (in int) wrong number (or type) of arguments: invalid options or option values passed to definite integration. <=
A fallback was to use summation, but that doesn't work at all, same typ of error as the Error for int. (Not shown.)
So my fallback is to use a for loop to sum the set. The for loops produce another set of values, and I think I have to make interpolation objects for that as well. And so on. I really was expecting Maple to handle this better.