Master Scheduling Creating Planned orders without Start Date and End Date for some orders Ax 2012 R2

When we run Master Scheduling batch job from below path (Master Planning > Periodic > Master Scheduling), its creating planned orders - some with start date and end date and some with out Start Date(ReqPO.SchedFromDate) and End Date.


The batch job status changes to ENDED but we can see a log that shows below error