This may or may not be a match, but it is worth checking out.   Your invoice number with the problem appears to be 0243551IN.

Products

Sage 100 ERP

Description

Error: "47 AR_PeriodEndProcessing_ui.pvc 645" when running AR Period End Processing

Disclaimer

Backup Warning

Use caution when working with the below product functionality. Always create a backup of your data before proceeding with advanced solutions. If necessary, seek the assistance of a qualified Sage Business Partner, network administrator, or Sage Customer Support Analyst.

Cause

The Invoice Date field in AR_OpenInvoice.m4t may be blank.

Resolution

Determine the affected invoice transaction(s)

Select Info, Debug at the Error screen and enter the following command:

? OpenInv.InvoiceNo$

Select Library Master, Utilities, Data File Display and Maintenance

Select ..\Mas90\MAS_xxx\Arxxx\AR_OpenInvoice.M4T (xxx = company code)

Select the record from step 1 and click the Edit button

In the Field Number list, select 5 - InvoiceDate$

In the Change field, add the invoice date with date format YYYYMMDD

Click the OK button.

Perform Period End Processing

Repeat steps if error occurs again. It is possible multiple records have issue

Tom this was exactly the issue, there were 15 invoices without a invoice date. Your solution was spot on, I appreciate your help!