Problem with Seleection

Hello Gurus.

It is an normal simple Select. But the Subrc is 0 and the is no result.

SELECT k~xblnr

INTO lv_xblnr

FROM dfkkko AS k

INNER JOIN dfkkop AS p

ON p_{opbel = k}opbel

WHERE k~opbel = wa_erdk-opbel

AND p~augst = space.

Thanks for your help

chris