Floating simulation error
Cosmic rays, perhaps? :) http://blog.revolution-computing.com/2009/04/blame-it-on-cosmic-rays.html Seriously though, my guess is that the simulation data from your 201st iteration is tickling some subtle bug in your code. This has happened to me before where I generate a random matrix that happens to be non-invertible, for example. I'd suggest grabbing the data from your 201st iteration (a simple way would be to run your RNG 200 times at the start of your code) and debug from there. # David Smith
On Thu, Apr 23, 2009 at 11:12 AM, Brendan Morse <morse.brendan at gmail.com> wrote:
Hi all, I am running a simulation and a curious error keeps coming up that stops the whole process. The error is a subscript out of bounds error, and it seems to happen at different points (floating around) throughout the looping simulation. Say, for example, it crashes on sample 1 - iteration 200. I can force it to start again on iteration 202 with all of the same settings, and it is fine. I can also force it to start again on iteration 201 if I modify the starting seed value and it goes on its merry way. What I think is happening is that certain seed values are disrupting something and causing the subscript error. My seeds are set as follows: The simulation has x number of conditions. The starting seeds are set to equal the condition number (1 to x). The program runs 500 iterations within each condition, and the seed values for each iteration are set as x+iteration number. So, for condition 1, iteration 1, the starting seed value would be 2, then 3 etc. etc. At some point, I will get the subscript error but it seems unpredictable. Has anyone had a similar problem or an idea as to what might be happening? - Brendan Brendan Morse, M.S. Industrial/Organizational Psychology Ohio University Office: 335 Porter Hall Website: http://oak.cats.ohiou.edu/~bm123504 ? ? ? ?[[alternative HTML version deleted]]
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