Doubt on Ok Codes

Hi Experts,

Please can any one tell me , what is the use of ok code '=XPOD'. It is coming when i am uploading Customer data, when i check the check box for POD , this OKCODE will generated.

And also when i check the POD check box it shows the error when processing the data. Please can any one suggest me on this.

Thanks in Advance...

Regards

Srihari.