Recurring Invoices builds AccHist to an alarming size

Has anyone seen anything similar?

v2019.2.3 and Pervasive v9.

We can create the recurring invoices there is no problem.

We create an invoice batch using Process> Scheduled Invoices.

If it is a one or two line invoice, no problem, the batch is created.

If it is a batch of 5 line invoices, then the program loops, and the AccHistH and AccHistL files grow continuously. Initially we left it to run overnight, and the files grew to over 16GB.