Common SAP MM Questions I

Can any one tell me what is MM closing and what is FI closing? How can I know if period is closed?

MM closing means that you can not post materials document. In MM area you have two open periods current and previous.
If you do not set other in MMRV - here you can check which are the open MM periods for company code. If you check Allow posting to previous period - it will forbid MM posting in previous period.

FI open period (ob52) allow to post FI documents. As I know you can allow postings for some accounts - for example forbid material accounts for previous period in order to prevent MM posting until you finish all FI documents.
*--Monika Hubanova