Unable to validate Order Numbers in Productivity Suite?

One of the most common errors seen when using the Productivity Suite OS Data Converter is shown in the below example, relating to the inability to validate the Order Number:

The error is thrown because Productivity Suite is unable to process data with different order numbers at the same time. Productivity Suite is able to process multiple datasets/ files with the same order number, but does not support the mixing of order numbers during a single processing session. If you have data with different order numbers, you will be required to process them in separate order number batches.

The order number is the first set of digits in the file name:

E.g. 86106-HP5505-25i7.gz