If CargoExport is called with no table name or one that doens't exist, no error message is shown. This is inconsistent with how it works for other missing parameters — for example, calling without a valid format= results in "Error: Format must be set."

• Has error message (if posts table exists): https://example.org/w/index.php?title=Special:CargoExport&table=posts
• Does not have error message, but should (because post table doesn't exist): https://example.org/w/index.php?title=Special:CargoExport&table=post