I found you on our system, thanks for registering your Company information so we know who you are - this helps us, as you do not indicate in your post what product you are speaking of, and several products have invoice batches.

Unfortunately, the support we can provide on such an old version of QIP DOS is limited. This version (6.2B) was discontinued in 1998!

Basically, if you have already posted the batch - you are limited in your options, however, because of QIP's flexibility this is easily remedied. Unless you made a backup of your data just prior to posting the batch, (as the warning tells you) in which case, you could restore the data from that backup, edit the invoice in the batch, do another backup, then post the correct information - then you only have these options:
1. Go into QIP and restore the invoice from History as a credit note to offset the incorrectly posted invoice, and repeat this to restore it as an invoice which you can edit to reflect how it should have been posted. This will also update A/R Customer transactions as well. This would be the suggested method, so that you can quickly identify the offsetting documents, and see a correctly posted one in the AR Current Customer transactions area.

2. Alternatively, you can restore the invoice from history as an invoice, and then edit it to add the offsetting entries directly as another line item(s). This will produce one document that does two things: credits back the original entry, and re-bills the correct one.

3. You can also enter an adjustment in A/R, however, it is best to stick to one of the above methods, so all the correct accounting is done automatically by the system, if you enter the correct information.

To restore a document from History in QIP, from the main QIP menu...
1. Select Housekeeping.
2. Select History Maintenance.
3. Select View/print/restore history invoices.
4. Select the Customer and Invoice Number that was posted incorrectly.
5. Select Restore (on the far right).
6. Enter your options as follows (for best results):
Y to increment doc number
Y to create Credit Note
Y to revise Date fields
Y to edit document after restore
N to restore to archive batches
Restore to existing Batch - that's up to you.

7. If using suggestion #1, then repeat the above steps, except say N to create Credit Note. This will be the invoice you will actually edit to make the changes to. The Credit Note you restored first will be left as-is to post, to 'cancel out' the original invoice.

NOTE: BEFORE DOING ANY OF THESE STEPS - MAKE A GOOD BACKUP OF THE DATA!!!

Good luck!