How to buid an extjs app for production?

How to buid an extjs app for production?

I'm trying to build for production an extjs4 app devolped with sencha
architect. Included in my app.html markup compiler directives <!--
<x-compile> -->
I basically want my app and remote dependencies minimized.
Following this
guideline:http://docs.sencha.com/cmd/3.1.2/#!/guide/command_app_single
I run
C:\temp\bs>sencha compile -classpath=..\ext\src,app page -yui -in app.html
-out
build\app.html
but get:
Sencha Cmd v3.1.2.342
[INF] Compiling page null
[ERR] Error executing page compilation java.io.IOException: The filename,
direct
ory name, or volume label syntax is incorrect
[ERR] com.sencha.exceptions.ExBuild: java.io.IOException: The filename,
director
y name, or volume label syntax is incorrect
Any help is greatly appreciated. Thanks