Problem to start sqlldr with parfile=parfile.par

Question

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?