Numerical error

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JaCl
Posts: 18
Joined: Fri Nov 26, 2010 2:02 am
Location: University of Innsbruck

Numerical error

Post by JaCl »

Hello, I do an IDA-analysis.

But with some records the analysis stops at a certain intensity - and I dont know why.
The error message I get is the following:

Vector::Vector(int) - out of memory creating vector of size 1460

What is the problem? What can it be and how can I solve it?

Thanks, Clemens
vesna
Posts: 3033
Joined: Tue May 23, 2006 11:23 am
Location: UC Berkeley

Re: Numerical error

Post by vesna »

What system solver do you use?
JaCl
Posts: 18
Joined: Fri Nov 26, 2010 2:02 am
Location: University of Innsbruck

Re: Numerical error

Post by JaCl »

I am using the following analysis commands:

algorithm NewtonLineSearch
system BandGeneral
constraints Transformation
numberer RCM
test NormDispIncr [lindex $TestTolList 0] 50 0
integrator Newmark $gamma1 $beta
analysis Transient
vesna
Posts: 3033
Joined: Tue May 23, 2006 11:23 am
Location: UC Berkeley

Re: Numerical error

Post by vesna »

Try using one of the sparse solvers. An example would be:

system UmfPack
JaCl
Posts: 18
Joined: Fri Nov 26, 2010 2:02 am
Location: University of Innsbruck

Re: Numerical error

Post by JaCl »

I tried all the solvers, but non worked.
What does this error message say?
Is it an ill conditioned problem or something else?
vesna
Posts: 3033
Joined: Tue May 23, 2006 11:23 am
Location: UC Berkeley

Re: Numerical error

Post by vesna »

In that case you are having problems with memory. Are you creating lists that you are not deleting after you use them? This may consume all you memory.
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