This page explain an important note on Business Template export. This is a sort of guideline to prevent previous bugs from appearing again.

As you may know, you are likely to experience problems if you build and export a business template in the same transaction. Hence, it is important to commit the transaction between the build and the export.

For exemple, in a script you should do:

1. bt.build()
2. get_transaction().commit()
3. bt.export(path=path)"

Don't forget to commit the transaction or you will experience problems.