Subfig package in latex

Question

When I use the subfig package in latex, it gives some errors:

Package subfig Warning: Your document class has a bad definition  
 of \endfigure, most likely  
 \let\endfigure=\end@float  
 which has now been changed to  
 \def\endfigure{\end@float}  
 because otherwise subsequent changes to \end@float  
 (like done by several packages changing float behaviour)  
 can't take effect on \endfigure.  
 Please complain to your document class author.  


Package subfig Warning: Your document class has a bad definition  
 of \endtable, most likely  
 \let\endtable=\end@float  
 which has now been changed to  
 \def\endtable{\end@float}  
 because otherwise subsequent changes to \end@float  
 (like done by several packages changing float behaviour)  
 can't take effect on \endtable.  
 Please complain to your document class author.  

(/usr/share/texmf/tex/latex/caption/caption.sty  
         `rotating' package detected  
         `float' package detected  
)   

LaTeX Warning: You have requested, on input line 139, version  
               `2005/06/26' of package caption,  
               but only version  
               `1995/04/05 v1.4b caption package (AS)'  
               is available.  

! Undefined control sequence.  
l.163 \DeclareCaptionOption  
                           {listofformat}{\caption@setlistofformat{#1}}

How can I solve it?

Thank you and welcome!

Answer 1

It looks like a clash between the subfig and the old version of the subtitle package. Try updating the swap package to something later. In general, it is recommended that you upgrade all packages to the latest versions.