RE: Cannot generate a pro forma invoice - Posting Company does not exist
Changes to SrsReportRdIDataContract not supporting older packed data versions of report data that were stored in Usage Data.
Example: Packed data on customer environment were pack version 3, while the latest 10.0.26 code supports only pack version 4 and 5.
In order to resolve the issue perform the following steps:
Delete controller classes from Usage Data with Element name = report name + controller, such as:
FreeTextInvoiceController
SalesInvoiceController
SalesConfirmController