"The application cannot find the key value"

This error usually means that one or more required fields on the record are missing values. It can also be an indication of data corruption.

Solution:

If you receive this error while trying to post a transaction, check the record and make sure all of the required fields have values.  Check the date, tag number, warehouse id, item id, customer id, etc. If no data is missing on the record, contact KSS tech support and have us examine the database for problems.