Now that all products use the same document type, it is perhaps less obvious when a document is not openable in Express after you have been making changes in Gold (because you no longer need to do a down-save which would warn you).
It's worth knowing what the factors are that will prevent a file from being opened in Express or Cashbook. As an exercise, you might want to do a custom report that checks these things for you.
Features not supported by Express (there must be no instances of these in the file):
- Departments
- Jobsheet entries
- Purchase orders
- Sales Orders
- Quotes
- Stock Journals
- Inventoried Products
- More than one P&L account
- More than one AP account
- More than one AR account
For cashbook, you must not have any:
- Jobs
- Debtors
- Creditors
- Debtor Invoices
- Creditor Invoices
- Balances of AR and AP accounts must be zero