There are two reasons you may see a pending invoice error:
There are purchase orders with zero duration.
There is an apostrophe in the invoice number field, for example St Anne's123.
You may also see the following error message:
'Object: Hounslow | Procedure: Function: PendingInvoiceCreateRecordsForClient | Number: Parameters: | Description: @idClient: [clientID] @idPeriod: [periodID] @vcInvoiceNumber: [invoicenumber]'
Zero duration
This error can occur when the pending invoice generates for a client that has purchase orders with a duration value of zero.
To resolve this, your local authority needs to amend the purchase orders with zero per week durations to include a valid duration value.
Apostrophe in the invoice number
This error can also occur when there is an apostrophe in the invoice number field.
To resolve this, remove the apostrophe from the invoice number and run the period again.