Cross engine JOINs table name error

Hello,

the following cross engine select throws an error:

SELECT * FROM columnstoretable as cs JOIN `l-cells` as idb ON cs.key_id = idb.key_id

l-cells is an innoDB table. If the hyphen is removed the error vanishes.

I get the error:

"fatal error reading result from crossengine client lib (1064). The same SELECT für two innoDB tables works without problems. Are there any documented restrictions for the naming of tables in cross engine joins?

Best regards
Matthias