Repeated error 86 Netbackup 7.5

Hi All,

I have Netbackup 7.5 run in Solaris 10. There is these two online backup policies that use 7 tape drives streamingly. But, since 5 days ago, there's always error 86 appear among the streaming

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Every time one of both policies above running, there will be one or two streaming got error 86 on different tape drives and different media.

These are the messages on solaris:

bash-3.2# tail /var/adm/messages
Apr 28 07:40:48 backupdrc bpjava-msvc[167]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
Apr 29 06:44:52 backupdrc bpjava-msvc[2841]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
Apr 30 11:17:31 backupdrc bpjava-msvc[25779]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
Apr 30 11:41:48 backupdrc bpjava-msvc[29228]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
May  1 06:57:53 backupdrc bpjava-msvc[282]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
May  2 07:48:25 backupdrc bpjava-msvc[23494]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
May  2 08:23:28 backupdrc bpjava-msvc[29221]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
May  2 10:07:52 backupdrc bpjava-msvc[15592]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
May  2 15:28:15 backupdrc bpjava-msvc[5370]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.
May  2 15:36:12 backupdrc bpjava-msvc[6510]: [ID 427199 user.error] pam_dial_auth: terminal-device not specifiedby login, returning Error in underlying service module.

I've attached the media log. (medialog.txt)

So, any one have faced problem like this before? Please help anyone. 

Thank you