Database Inconsistency of Employee with Infotype 0001

Hi

I have couple of questions:

1. I want to delete few of the Employees Records who are having Gaps in IT0001.

2. Few of the Employees' EARLIEST Records are having End Date as 12/31/9999. This data has got loaded into the System through Batch input. How to Delete those Records?

For both of the above things, the System is giving Weird messages or going to Dump; When I try to either Delete the Record (which doesn't have similar dates as of IT0000) or Change the End Date.

Any kind of help would be highly appreciated.

Thanks in advance,

HR_Guy.