Problem to start sqlldr with parfile=parfile.par

If have installed Oracle Client 21.11 under Ubuntu. Sqlplus is working fine so far. Only when I try to use sqlldr in combination with parfile it is not working. when I call sqlldr user.../pw...@ORCLPDB1 parfile=parfile.par I got the follwing SQL*Loader: Release 21.0.0.0.0 - Production on Sat Sep 23 17:07:40 2023 Version 21.11.0.0.0 Copyright (c) 1982, 2023, Oracle and/or its affiliates. All rights reserved. Path used: Direct No error-message and nothing happen If I only enter sqlldr user.../pw...@ORCLPDB1 without parfile= I got control = and I enter my control-file control = /t/cdp/cdp7/sp3b/data/out/mandant-201/tmp/KEY_0_00020230923122819.ctl SQL*Loader: Release 21.0.0.0.0 - Production on Sat Sep 23 17:19:14 2023 Version 21.11.0.0.0 Copyright (c) 1982, 2023, Oracle and/or its affiliates. All rights reserved. Path used: Conventional Commit point reached - logical record count 1 Commit point reached - logical record count 2 Commit point reached - logical record count 3 Table KEY_0_000XMLF: 119 Rows successfully loaded. Check the log file: KEY_0_00020230923122819.log for more information about the load. I can upload the file without any problem. Has somebody a idea why sqlldr is not taking the parfile ? What could be the error?