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Panos,<br>
<br>
The maximum value for a 4-byte int is 2147483647. The Jacobian can
be pretty much as large as you want (we routinely run problems in
IPOPT with 100 million nonzeroes +).<br>
<br>
Damien<br>
<br>
<div class="moz-cite-prefix">On 2015-06-08 11:51 AM, Panos
Lambrianides wrote:<br>
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<div>Hi everyone,<br>
<br>
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I have a question about the largest size of the Jacobian
for the constraints.<br>
<br>
</div>
While setting up the problem the variable nnz_jac_g is used
to set up the number of non-zero constraint for the
Jacobian. This is of type <b>Index</b>, which is itself an
<b>int</b> in C++. The upper limit for int is <code>32767
(2^15-1).<br>
<br>
</code></div>
<code><font face="arial,helvetica,sans-serif">Is there a
reason why this is an int (versus a long for example) and
more importantly is there a way to overcome this
limitation? I would be happy to tweak the code if someone
would point out the right places to do so.<br>
<br>
</font></code></div>
<code><font face="arial,helvetica,sans-serif">Many thanks,<br>
</font></code>
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-- <br>
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<div dir="ltr">Panos Lambrianides
<div><a moz-do-not-send="true"
href="mailto:panos@soe.ucsc.edu"
target="_blank">panos@soe.ucsc.edu</a></div>
<div>(415) 713-6718 (Mobile)<br>
</div>
<div><a moz-do-not-send="true"
href="https://sites.google.com/a/ucsc.edu/uncertainty-quantification/"
target="_blank">https://sites.google.com/a/ucsc.edu/uncertainty-quantification/</a><br>
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