Error while assigning group

Hi friends,

1. Iam getting the following error when assigning the group to a user.

<b>An error occurred while adding group assignments; to see the correct status, perform a new assigned groups search</b>

2. When uploading the template also its throwing the java.null exception..

template contains , user name, password, roles , mail_id, group..

after uploading the template all the above information is created except group

when i search for the user which is created based on uploading template ,

the group is not assigned.

I need to send users list asap with groups assigned. but its giving problem...

can anyone suggest me on this..

Thanks & regards

Sireesha.