>When trying to add a record I get this message:
>"Table tableName has one or more non-structural indexes open. Please close them and try the Begin Transaction again."
>Can someone tell me what this means and how to solve it, please?

It means you have an index aside from the structural .CDX open against the table (maybe you did something like INDEX ON blah TO woof, creating a .IDX); you need to close them down within the scope of the transaction.