My experience has been that once I cleared up the cause of the problem, as in a
tape drive error, that the ANR9999D messages did not reoccur.  Once the ANR9999D
occurred without any other obvious errors and working with support I found that 
I
need a patch.  I suggest you fix the tape drive error and continue as usual.

Hanna Hahne wrote:

> Last weekend I had a problem with one tapedrive which screwed up
> migration; I got a lot of mount request errors. Finally one session
> ended with the follwing errors:
>
> ---------------------------------------------
>  ANR8447E No drives are currently available in library ACL.
>  ANR1401W Mount request denied for volume 000852 - mount
>                           failed.
>  ANR0525W Transaction failed for session 34898 for node
>                           XXXXXXX (SUN SOLARIS) - storage media inaccessible.
>
>  ANR9999D bfcreate.c(1799): Unexpected session descriptor
>                           10008ee1 for open aggregate, received descriptor
>                           3afd43e0.
>  ANR9999D sstrans.c(580): Unexpected next frame sequence
>                           number 2 - aggregate may already be open.
>  ANR0530W Transaction failed for session 34898 for node
>                           XXXXXXX (SUN SOLARIS) - internal server error
> detected.
>
> -----------------------------------------
>
> The session then ended with normal session statistics. Do I have a
> serious problem or can I ignore the ANR9999D?
>
> Server: AIX 4.3.3 / TSM 3.7.4
> Client: Solaris 5.7 / ADSM 3.1.0.8
>
> Hanna
> Hanna Hahne                      email:  Hanna.Hahne AT dkfz DOT de
> ZDV (R0100)                      Tel.:   06221 42 2357
> Deutsches Krebsforschungszentrum Fax:    06221 42 2399
> Im Neuenheimer Feld 280