puzzling parfor error during large calculation

2014 3 29
1 个回答
回答已采纳
更新时间：2016 5 1
4 次查看（30 天）

0 个投票

Hi there
I am running a large number of differential evolution optimization runs on a 4-parameter problem, for different input control parameters. I am using parfor to speed up things significantly. However I have experienced some weird error instances which, given that I have tested the whole thing as a normal for-loop, suggests that the parallel-toolbox is experiencing problems. The error in question is:
Caught "std::exception" Exception message is:
fl:filesystem:PathNotFound
Error using distcomp.remoteparfor/getCompleteIntervals (line 138)
An unexpected error occurred during PARFOR: Error in remote execution of
remoteParallelFunction : RUNTIME_ERROR
Error in runnested_eddy_Lee_DEparamopt_mainprog (line 23)
parfor ii=1:length(NPop)
Does anyone know what this means? I gather that a file associated with the parallel run is missing but I don't know how to fix that, if that is the case, and google gives me no clues as to the cause/solution of this problem.
Cheers
Jakob

请先登录，再回答此问题。

 采纳的回答

Jakob Sievers
Jakob Sievers 2014-3-29
编辑：Jakob Sievers 2014-3-29

1 个投票

I think I may have solved the issue. I dug deep into the optimization code and discovered that it saves a temporary file, and deletes it again following the calculation. Throw that into a parfor loop and the file is created and deleted by separate processes and the whole thing goes wrong. I attached a time-signature to the filename during its creation and the problem seizes to be relevant.

2 个评论
显示 无 隐藏 无

Mission
Mission 2014-10-4
I am stuck in the same problem. But the method you propose does not work. Could you give me more detailed information. Thank you!
Rinu
Rinu 2016-5-1
I had the same problem, and in my case it seems the problem was caused because I open different files using the same filename in every loop and did not close the file before exiting the loop. Using fclose within the loop solves the problem.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by