Sales order availaibility date one day in past

Hi Experts,

I am facing an issue in SNP planning book / Product view wherein Sales order availability date is one day in past (say, date in ECC 01.04.2015 00:00 hrs --> date in APO 31.03.2015 23:00 hrs). This only happens for plants where DST is maintained. DST ends in March, and this issue is popping up for the sales orders in the subsequent month, i.e. April. The same error is also present in the next month of the DST starting month. The issue is not present in any other months.

I guess this is due to some inconsistencies that has arisen in APO. I saw a previous thread, http://scn.sap.com/thread/1816822, but it has ended without any solution.

Note, we are not using GATP.

Thanks in Anticipation.

Regards,

Biplab