Xypic compiling error with auctex

Please find the code here:

documentclass[12pt]{article}

usepackage{amsbsy, amsmath, amssymb, amsthm, bbold, xcolor, xspace}
usepackage[all,pdf]{xy}

usepackage{Documents/tex/essentials/symbols}  % line 1


%input{Documents/tex/essentials/symbols-command} % line 2

%newcommand{arrp}[4]{mbox{$xymatrix{ {#3} ar@<0.6ex>[r]^-{#1} ar@<-0.6ex>[r]_-{#2} %& {#4}}$}} %line 3


begin{document}


Using usual Xy-pic:
$xymatrix{ {A} ar@<0.6ex>[r]^-{f} ar@<-0.6ex>[r]_-{g} & {B}}$

Using the {tt symbols.sty} package which contains all my TeX macros:

arrp{f}{g}{A}{B}


end{document}


%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End:

Let me list my attempts and their outcomes:

• With Line 2 and Line 3 commented out, as it is now, the second parallel pair of arrows does not come, the first comes however. The errors produced is given in the code block:

./testXy.tex:21: Argument of next@ has an extra }.
<inserted text> 
                par 
l.21 arrp{f}{g}{A}{B}
                      
Runaway argument?
hdir 
./testXy.tex:21: Paragraph ended before next@ was complete.
<to be read again> 
                   par 

or

l.21 arrp{f}{g}{A}{B}
                      
./testXy.tex:21: Extra }, or forgotten $.
entrybox ...dimen@ D@p dp z@ =dimen@ boxz@ }
                                                  
l.21 arrp{f}{g}{A}{B}
                      
./testXy.tex:21: Extra }, or forgotten $.
<inserted text> egroup 
                        def Drop@@ {styledboxz@ }def Connect@@ {straig...l.21 arrp{f}{g}{A}{B}

or

l.21 arrp{f}{g}{A}{B}
                      
./testXy.tex:21: Extra }, or forgotten $.
entrybox ...dimen@ D@p dp z@ =dimen@ boxz@ }
                                                  
l.21 arrp{f}{g}{A}{B}
                      
./testXy.tex:21: Extra }, or forgotten $.
<inserted text> egroup 
                        def Drop@@ {styledboxz@ }def Connect@@ {straig...l.21 arrp{f}{g}{A}{B}

or like

./testXy.tex:21: Xy-pic error: illegal <dir>: dir [r]^-{f} not defined.
xyerror@ ...#2}fi errmessage {Xy-pic error: #1}
                                                  }
l.21 arrp{f}{g}{A}{B}
                      
./testXy.tex:21: A <box> was supposed to be here.
<to be read again> 
                   toks@ 
l.21 arrp{f}{g}{A}{B}
                      
./testXy.tex:21: Xy-pic error: illegal <dir>: dir ar@ <-0.6ex>[r]_-{g} not defined.
xyerror@ ...#2}fi errmessage {Xy-pic error: #1}
                                                  }

or

61>
./testXy.tex:24: Improper prevdepth.
newpage ...everypar {}fi par ifdim prevdepth 
                                                  >z@ vskip -ifdim prevd...l.24 end{document}
                   
./testXy.tex:24: Missing } inserted.
<inserted text> 
                }
./testXy.tex:24: Xy-pic error: An xy environment is not closed correctly..
xyerror@ ...#2}fi errmessage {Xy-pic error: #1}
                                                  }
l.24 end{document}

I have put snippets of all forms of errors that have come while the LaTeX engine was trying to find for the error. Obviously there were repetitions, which I excluded.

• With Line 1 and Line 3 commented out and Line 2 in place, there is no problem and output is produced as expected.

• With Line 1 and Line 2 commented there was also error:

Runaway argument?
{mbox {$xymatrix { {##3} ar @<0.6ex>[r]^-{##1} ar @<-0.6ex>[r]_-{ETC.
! File ended while scanning use of @argdef.
<inserted text> 

and the process aborted! But there is no ##1 or likewise....

Yet, the file symbols.sty is just the file symbols-command.tex made into a style file instead of making an input of .tex file. I was using these symbols for pretty long time using the *symbols-command.tex" file as input and had not problems. The problem started when I made the style file.

The line is question is obviously the construct in Line 3.

Any help would be appreciated.

With my regards and thanks,

partha