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Error Codes
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Here is the list of error codes which could be useful to handle errors and to provide user with the proper error message.
You can see a practical example of errors handling in the MultiUser demo supplied with the Absolute DB.

 // error codes
 const ABS_ERR_OK = 0
;
 const ABS_ERR_INSERT_RECORD = -1
;
 const ABS_ERR_UPDATE_RECORD = -2
;
 const ABS_ERR_DELETE_RECORD = -3
;
 const ABS_ERR_UPDATE_RECORD_MODIFIED = -4
;
 const ABS_ERR_DELETE_RECORD_MODIFIED = -5
;
 const ABS_ERR_UPDATE_RECORD_DELETED = -6
;
 const ABS_ERR_DELETE_RECORD_DELETED = -7
;

 const ABS_ERR_CONSTRAINT_VIOLATED = -8
;
 const ABS_ERR_UPDATE_RECORD_PROHIBITED = -9
;
 const ABS_ERR_DELETE_RECORD_PROHIBITED = -10
;
 const ABS_ERR_CANCEL_PROHIBITED = -11
;

 const ABS_ERR_RECORD_LOCKED = -12
;
 const ABS_ERR_TABLE_LOCKED = -13
;


Example:

procedure TMainForm.ABSTable1DeleteError(DataSet: TDataSet;
  E: EDatabaseError; var Action: TDataAction);
begin
   Action:=daAbort;
   if (E is EABSEngineError) then
        case (EABSEngineError(E).ErrorCode) of
          ABS_ERR_RECORD_LOCKED:
           begin
           if MessageDlg('The record is locked. '
+
                         'Do you want to try to delete this record again?'
,
                          mtWarning,[mbYes,mbNo],0
)=mrYes then
              Action:=daRetry;
           end;
          ABS_ERR_TABLE_LOCKED:
           begin
           if MessageDlg('The table is locked. '
+
                         'Do you want to try to delete this record again?'
,
                          mtWarning,[mbYes,mbNo],0
)=mrYes then
              Action:=daRetry;
           end;
          ABS_ERR_DELETE_RECORD_MODIFIED:
           begin
             MessageDlg('The record you are trying to delete has been modified by another user. '
+
                        'The table will now be refreshed. If you want to delete this record, try again.'
,
                        mtWarning,[mbOk],0
);
             DataSet.Refresh;
           end;
          ABS_ERR_DELETE_RECORD_DELETED:
           begin
             MessageDlg('The record you are trying to delete has been deleted by another user '
+
                        'The table will now be refreshed'
,
                        mtWarning,[mbOk],0
);
             DataSet.Refresh;
           end
      else
         MessageDlg(E.Message,mtError,[mbOK],0
);
       end
   else
      MessageDlg(E.Message,mtError,[mbOK],0
);
end;


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