You need to use the Find Batches window to find the Batch on the Enter Journals form. From there, you can delete the batch. The first window that is displayed when you navigate to the Enter Journals form is the Find Journals window. You can not find the Batch using this window, since there are no journals associated with the batch. See Note 1036784.6 for detailed instructions.  

In Release 10.7, you must set the profile option 'Journals: Allow Posting During Journal Entry'. In Release 11, this is  controlled with Function Security.

Set the 'Printer' profile option. This profile option must be  set to successfully submit most concurrent requests.

NO.  When you drop a summary template, and reassign the child values, Summary Account Inquiry does not save the history of the previous accounts. 

4 requests:  1 for the parent and 3 for child accounts.

NO, It just groups the existing accounts to meet the summary template criteria.

You cannot update the status via SQL*Plus to "Current".  These must be deleted and the summary accounts recreated.

Redefining summary templates can be confusing at times.

There are no limits on the amount of accounts which can be created by the Summary Template process however, the more templates created/maintained, the slower the performance of the concurrent programs.

 No. Closing a period in General Ledger does nothing more than close that period. There is no processing that goes on behind the scenes when you close a period.

No. Posting is controlled at the user level. A user can post all journals for a set of books or none at all. This is controlled by function security in Release 11 and 11i.  In Release 10.7, you can remove the Post form from the user's menu, to restrict posting. 

This is an unbalanced intercompany journal. If automatic intercompany balancing is not enabled for the set of books, you must manually add lines to the journal to balance the companies (balancing segment values). If automatic intercompany balancing is enabled, then one of the following is true:          -- An intercompany account has not been defined for...