In Sales Invoice i have created custom fields. i generate post dated invoices and put the required data in some fields, now some data has to be update on current date in one field, when i go to Batch update after data entry when update, New Data was loaded but one field data was totally Vanished.
If that’s right, then unfortunately that’s not enough information to replicate or investigate the issue.
You can click on history of that specific record at the bottom-right corner of it’s view screen to audit the changes made to the record. Maybe that will give us a clue.