Error in Roll up & Filling up an aggregate

Question

Hi all,
We have created 4 aggregates on 0SD_C03 ( Sales Overview cube). Initially we had filled the data to all the aggregates after the history data load successfully. Now after the delta load we are trying to manually roll up the aggregates. We have only one delta package request currently in the system. Now as we tried to schedule the roll up manually it gave an error stating:
Roll up terminated: SQL error 12801. the diagnosis of the error says:
"The database system registered an SQL error. As available, the error number and a description are included in the short text. Possible causes for SQL errors include:
1. Overflow of database objects such as buffers, temporary tablespaces, rollback segments or data containers/tablespaces.
->These problems can generally be eliminated by system administrators.
2. Missing generated database objects such as tables or views based on inconsistent or inactive InfoCubes or InfoObjects. Examples of this include the view of the fact table for an InfoCube or the attribute SID table (X/Y table) of a characteristic.
-> These problems can generally be eliminated by a BW administrator.
3. SQL requests with incorrect content.
-> Problems of this type are generally programming errors"
In the manage>requests Tab for the cube under the roll up status it says the roll up is still running !
now when we are trying to fill one of the aggregates after deactivating & activating sequentially that process is also getting terminated. error message from the job log states:
The roll up for InfoCube <cubename> has terminated
The system is not able to fill the aggregates at this time
Lock NOT set for: Fill aggregate (initial)
So we are not able to fill the aggregate either. Need your help badly as we are short on timeline as well.
Thanks in advance,
Abhishek.

Answer 1

Thanks M & Maithili for your prompt replies.
Let me give you more details.
1. There are no run time errors in ST22
2. There was a lock for the cube in SM12. I deleted that as suggested by you & then tried filling up the aggregate again but unfortunately it is giving me exactly  the same error once again.
3. in SM37 I could find a job BI_SAGR* getting triggered as soon as I tried to fill the aggregate. But the job terminates in 4 seconds.
4. in SM21 I could find 2 errors --
a. database error 12801 in FET:
Program                                                  Cl                            Problem cl                                 Packag
RSBATCH_EXECUTE_PROZESS             K                             SAP Web    AS Problem           SBAC
Module nam      Line          Table Name        Field Nam
dbacds             1433          12801                FET
Documentation for system log message BY 2 :
After the attempt to call a database operation, the database sy
returned the error code specified in the message, which indicat
the operation concerned could not be executed successfully.
b. database error 12801:
The log of this is exactly same as the above, only thing is the field name is missing.
Thanks,
Abhishek