Hallo Thomas,
jetzt gibt es noch diese Möglichkeit:

1. *Enter the command DSPSBSD QSYS/QSYSWRK, and select option 7
(Routing entries). *Scroll down to the entry with sequence
number 2511.
2. *Verify that this entry has a compare value of 'REXECSRVR'
(a 9 character value). *If this entry has a value of 'REXECSVR'
(an 8 character value), you are not experiencing the problem
which can be corrected by this procedure; in this case, contact
your service provider for additional assistance.
3. *If *you found the 9-character compare value in step 2,
press F3 to end the DSPSBSD command, and then enter the
following command exactly as shown:
CHGRTGE SBSD(QSYS/QSYSWRK) SEQNBR(2511) CMPVAL('REXECSVR')
Note that the compare value MUST be exactly 8 characters in
length and entered in all uppercase.
4. *Start the REXEC server using the command STRTCPSVR *REXEC,
and verify that the server is operational.