Requisitions import by interface with encumbrance on

Hi,

I developed the requisition open interface to import by the requisition import program some requisitions, the requisitions are internal requisitions to convert into orders in OM, everything went fine until we set on the encumbrance, I'm getting this error:

"GL date is not in a valid inventory calendar and open period

Cause:        GL date must be in a valid period inventory calendar 

and open period for a source type of 'INVENTORY' if encumbrance is ON.

"

I review the periods in Inventory, Purchasing and GL but everything is ok, I don't know how to solve this problem, Could anyone help me with this issue.