PM mantenance plan deadline monitoring IP30

Dear friends,

We are runing ECC 6.00 since 2007 and we had created back ground job for the transaction IP30

In this transaction, selection of Maint Plan kept " BLANK "

This back ground job was runing since 2012. Suddenly we found that the NEW maintenance plan created in 2011 schedule once run IP10 also,

maintenance order are not getting generated.

We check the background job and in the spool list it selected that all the maintenance plan including NEW one. But Order not generated.

Our users have created many NEW maint plan and for all, same problem.

Any idea please

Thanks

Jayant Joshi