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<P style="MARGIN: 0cm 0cm 10pt" class=MsoNormal><SPAN style="mso-ansi-language: EN-US" lang=EN-US><FONT size=3><FONT face=Calibri>Andreas <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></SPAN></P>
<P style="MARGIN: 0cm 0cm 10pt" class=MsoNormal><SPAN style="mso-ansi-language: EN-US" lang=EN-US><FONT size=3><FONT face=Calibri>Thank you very much for your reply.<o:p></o:p></FONT></FONT></SPAN></P>
<P style="MARGIN: 0cm 0cm 10pt" class=MsoNormal><SPAN style="mso-ansi-language: EN-US" lang=EN-US><FONT size=3><FONT face=Calibri>Its works now!!<o:p></o:p></FONT></FONT></SPAN></P>
<P style="MARGIN: 0cm 0cm 10pt" class=MsoNormal><SPAN style="mso-ansi-language: EN-US" lang=EN-US><FONT size=3><FONT face=Calibri>Thanks again, Juan<o:p></o:p></FONT></FONT></SPAN></P>
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> Date: Thu, 12 May 2011 11:09:40 -0400<BR>> From: andreasw@watson.ibm.com<BR>> To: juanlaiglecia@hotmail.com<BR>> CC: <SPAN class=BlockEmailNoName>ipopt@list.coin-or.org</SPAN><BR>> Subject: Re: [Ipopt] AMPL options problem<BR>> <BR>> Hi Juan,<BR>> <BR>> Not all Ipopt options can be set from the AMPL command line. You can see <BR>> the list of options available through AMPL by typing<BR>> <BR>> ipopt -=<BR>> <BR>> in a shell, where "ipopt" is your AMPL Ipopt solver executable.<BR>> <BR>> I added this particular option to the list of recognized options in AMPL, <BR>> and committed it to Ipopt/trunk. It will be available in the next release <BR>> (or now in trunk, if you use the develpment version via svn).<BR>> <BR>> But you can always set all Ipopt option using the ipopt.opt file. So, <BR>> even with your current Ipopt version, you can just create a file called <BR>> 'ipopt.opt' in the directory where you run AMPL, and include the line<BR>> <BR>> ma57_pivot_order 4<BR>> <BR>> See also the Ipopt documentation about the use of the ipopt.opt options <BR>> file.<BR>> <BR>> Hope this helps,<BR>> <BR>> Andreas<BR>> <BR>> On Thu, 12 May 2011, Juan Ignacio Laiglecia wrote:<BR>> <BR>> ><BR>> > Dear,<BR>> > I have had problem when I used this IPOPT option:<BR>> > ma57_pivot_order<BR>> ><BR>> > I am solving an entire natural gas plant in AMPL and I am very interested in reducing the computational times. In the ipopt option line I introduced it in this way:<BR>> ><BR>> > option ipopt_options " linear_solver ma57 ma57_pivot_order 4 ";<BR>> > option solver ipopt ;<BR>> ><BR>> > When I run the problem, AMPL send me: Unknown Keyword “ma57_pivot_order”<BR>> > Do you know what would the problem be? I should mention that I have the ipopt3.8 version.<BR>> ><BR>> > Thank you very much in advance.<BR>> > Juan<BR>> ><BR> </body>
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