# an NIntegrate inside a manipulate in mathematica was working and suddenly won't work now. it says indeterminent and it doesn't make any sense why

my title says pretty much everything heres what I'm entering. NumericQ returns a false value but it was true before. Im loosing my patience because this is so infuriating and makes no sense.

Manipulate[
1.054*10^-34/(2 .063*9.11*10^-31) (NIntegrate[
kz^2 kp (kz^2 (Vz) + kp^2 (Vp))^(-1/
2)*(1/(kz^2 +
kp^2))*((Exp[-1/
8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) -
kz Vd + 1.88*10^11)^2/(kz^2 + kp^2))] +
Exp[-1/8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) +
kz Vd + 1.88*10^11)^2/(kz^2 + kp^2))]) (Coth[
1/2] + 1) + (Exp[-1/
8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) -
kz Vd - 1.88*10^11)^2/(kz^2 + kp^2))] +
Exp[-1/8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) +
kz Vd - 1.88*10^11)^2/(kz^2 + kp^2))]) (Coth[
1/2] - 1)), {kp, 0, 2792.530}, {kz, 0,
2792.530}])/(NIntegrate[
kz^2 kp (kz^2 (Vz) + kp^2 (Vp))^(-3/
2)*(1/(kz^2 +
kp^2))*(((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) -
kz Vd +
1.88*10^11) Exp[-1/
8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) -
kz Vd + 1.88*10^11)^2/(kz^2 +
kp^2))] + (1.054*10^-34 (kp^2 +
kz^2)/(2 .063*9.11*10^-31) + kz Vd +
1.88*10^11) Exp[-1/

8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) +
kz Vd + 1.88*10^11)^2/(kz^2 + kp^2))]) (Coth[
1/2] + 1) + ((1.054*10^-34 (kp^2 +
kz^2)/(2 .063*9.11*10^-31) - kz Vd -
1.88*10^11) Exp[-1/
8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) -
kz Vd - 1.88*10^11)^2/(kz^2 +
kp^2))] + (1.054*10^-34 (kp^2 +
kz^2)/(2 .063*9.11*10^-31) + kz Vd -
1.88*10^11) Exp[-1/
8 ((1.054*10^-34 (kp^2 + kz^2)/(2 .063*9.11*10^-31) +
kz Vd - 1.88*10^11)^2/(kz^2 + kp^2))]) (Coth[
1/2] - 1)), {kp, 0, 2792.530}, {kz, 0,
2792.530}]), {Vz, .00360, .0750}, {Vp, .00360, .0750}, {Vd, 0,
4}]


Also I should add my computer died before it stopped working but I did save. This really makes no sense I cannot understand why it was working fine and now it isn't. I saved it also after I knew it was working well.

-
Have you tried restarting the kernel ? – Sektor Apr 20 '14 at 17:39
what does that mean? – James Apr 20 '14 at 17:43
Exiting and re-running Mathematica and then re-evaluating the expressions. – Sektor Apr 20 '14 at 17:56
I get Underflow. Try increasing the WorkingPrecision. See also SetPrecision or Quiet to control the message about the integrand not having enough precision. I had to set the Manipulate option SynchronousUpdating -> False, too, because the integrals took too long. – Michael E2 Apr 20 '14 at 18:00
This is extremely strange, yesterday all i did was put in the integral and it worked..... with the expected values of the experiment too! Its still running, I did put in synchronous updating. where should i place synchronous updating, perhaps its in the wrong place? – James Apr 20 '14 at 20:51