getting error when trying to run Multiple Applications in one codeigniter

[eluser]Unknown[/eluser]
i did what codeigniter user guide saying in this links
http://ellislab.com/codeigniter/user-gui..._apps.html

but i get two errors

the errors are

A PHP Error was encountered

Severity: Notice

Message: Undefined index: argv

Filename: core/URI.php

Line Number: 211

A PHP Error was encountered

Severity: Warning

Message: array_slice() expects parameter 1 to be array, null given

Filename: core/URI.php

Line Number: 211


after this error i get my results for two application folder normally. But these errors are came every time when i run each of my two applications. help me for removing these errors.