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Threading Files
The files included in the 4.0 release which hold the last threading number have give rise to a number of questions by third party developers as to their contents and usage.
The files in question are:
Accounts Receivable Last Sys Doc ID ARNEXTSY
Accounts Payable Last Sys Doc ID APNEXTSY
Order Entry Last Sys Doc ID OENEXTSY
Purchase Order Last Sys Doc ID PONEXTSY
Inventory Last Event ID INNEXTEV
Last Orig Doc ID INNEXTOR
Each of these Btrieve files shares a basic similarity in that it contains a single record. The record is a single 4 byte field defined as autoincrement field type. Each time a record is added to the file Btrieve will increment the value of the key. This is the next number to be used by the system.
The original record in the file must then be deleted.
Below are the standard steps used within Platinum to obtain the next number and update the file.
Read the record This is the number assigned to the
transaction being processed.
Write over the record
Add a new record
Delete the prior record
If multiple records are contained in the file they should be removed as the impact on processing are indeterminate.
