Hi Mithun,
Yesterday I ran my script and found this error bellow, i'm not a programmer, but I think the error is caused by a new interface created by Yahoo named NEO.
TKS FOR YOUR SUPPORT!
Follow the log of error:
[root@server dados]# ./grabyahoogroup.pl --attachments --verbose
Group to download : mygroup
[INFO][ ][ ]Started: Sun Sep 1 07:30:20 2013
[INFO][mygroup][ ]Redirected to: http://groups.yahoo.com/group/mygroup/
[INFO][mygroup][ ]Redirected to: http://groups.yahoo.com/neo/groups/mygroup/info
[INFO][mygroup][ ]Performing login
Use of uninitialized value $form in pattern match (m//) at ./grabyahoogroup.pl line 535.
Use of uninitialized value $post in substitution (s///) at ./grabyahoogroup.pl line 536.
Use of uninitialized value $post in substitution (s///) at ./grabyahoogroup.pl line 537.
Use of uninitialized value $form in pattern match (m//) at ./grabyahoogroup.pl line 541.
Enter password :
Use of uninitialized value $post in concatenation (.) or string at ./grabyahoogroup.pl line 573, <STDIN> line 2.
[FATAL][mygroup][ ][] 400 URL missing
Content-Type: text/plain
Client-Date: Sun, 01 Sep 2013 10:30:45 GMT
Client-Warning: Internal response
400 URL missing
[INFO][ ][ ]Finished: Sun Sep 1 07:30:45 2013