Error message when running "Close Income Statement"

Hi everybody,

While running " Close Income Statement" for the FY 01 Jan 13 - 31 Dec 13,  i got this error:

The transaction could not be completed because it will cause Inconsistencies in the G/L Entry table

Check where and how the CONSISTENT function is used in the transaction to find the reason for the error

Contact your system Administrator...

I followed these steps:

1. Close inventory period
2. Create new FY 2014
3. Close FY 2013
4. Run Close Income Statement

Any idea what might have caused this problem and how could be solved ?

Thanks in advance!

Uaja