why GL Opening balance(source system) exist for newly created reconciliation ?

Hi All,

We are using Hyperion 11.1.2.3.501 and we have a newly created reconciliation (balance comparison)  for which source and subsystem balances exists.

Example:

GL opening balance(source system)          = -1000

GL moment (Net activity)                            =  1000

GL closing balance(source system)           **is blank**

subsystem closing balance                         = - 200

Balance diff to be explained                        =   200

Adj to GL balance                                        =   0

unexplained Bal diff                                      =  200

we are trying to understand for a newly created reconciliation how a GL opening balance(source system) exists? and also how opening and moment balance is same?

Fyi: our source system is PeopleSoft and subsystem is file

Can anyone help me out on this