Venik,
The error message in your original post was syaing the file size was incorrect and that the system was expecting a larger or smaller file.
The original post was also from Feb. 02. Later on, logs from Feb. 14.
Today, Feb 20, are you still having the same problem with the original file from Feb 02? Or are you updating the definitions every day and have downloaded today's definitions and are experiencing the same problem?
* * * * * *
Errors in your logs
* * * * * *
1- 02/14 20:04:57 [7352] <Start>Unable to create Session with 'User Proxy' settings - Proxy Server: Error Code: 87
2- 02/14 20:08:45 [6312] <IndexHeartbeatProc>Sylink Comm.Flags: 'Connection Failed' = 1, 'Using Backup Sylink' = 1, 'Using Location Config' = 0
02/14 20:08:45 [6312] <IndexHeartbeatProc>Connection Failed! No. of tries = 1
* * * * * * * *
There are also some logs about the system going to the backup of Sylink.xml file.
02/14 20:06:36 [6312] <SwitchSylinkConfig:> Switching from sylink.xml..
02/14 20:06:36 [6312] <SwitchSylinkConfig:> Failed to switch to use SyLinkEx.bak
02/14 20:06:36 [6312] <SwitchSylinkConfig:> Switching from SyLinkEx.bak
* * * * * * * *
This all points to a communications issue.
Can you successfully telnet to the server (SEPM) on port 8014?