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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
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<A NAME="SNESSetForceIteration"><H1>SNESSetForceIteration</H1></A>
force <A HREF="../SNES/SNESSolve.html#SNESSolve">SNESSolve</A>() to take at least one iteration regardless of the initial residual norm
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscsnes.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../SNES/SNESSetForceIteration.html#SNESSetForceIteration">SNESSetForceIteration</A>(<A HREF="../SNES/SNES.html#SNES">SNES</A> snes,<A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> force)
</PRE>
Logically Collective on <A HREF="../SNES/SNES.html#SNES">SNES</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>snes </B></TD><TD>- the <A HREF="../SNES/SNES.html#SNES">SNES</A> context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>force </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> require at least one iteration
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<DT><B>-snes_force_iteration <force> </B> -Sets forcing an iteration
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
This is used sometimes with <A HREF="../TS/TS.html#TS">TS</A> to prevent <A HREF="../TS/TS.html#TS">TS</A> from detecting a false steady state solution
<P>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../SNES/SNES.html#SNES">SNES</A>, nonlinear, set, convergence, tolerances
<BR>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../SNES/SNESSetTrustRegionTolerance.html#SNESSetTrustRegionTolerance">SNESSetTrustRegionTolerance</A>(), <A HREF="../SNES/SNESSetDivergenceTolerance.html#SNESSetDivergenceTolerance">SNESSetDivergenceTolerance</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>intermediate<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/snes/interface/snes.c.html#SNESSetForceIteration">src/snes/interface/snes.c</A>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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