External routine problem

Hi,
I have created an external routine as follows
CREATE OR REPLACE PROCEDURE shel(command IN char)
AS EXTERNAL
NAME "sh"
LIBRARY shell_lib
LANGUAGE C
PARAMETERS (command string);
whne i ma trying to runthe above external routine i am getting the following error.
ORA-28575: unable to open RPC connection to external procedure agent
I configured the listener.ora (server) and tnsnames.ora (client) as follows
listener.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0/db_1)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost.localdomain)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
tnsnames.ora
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = PLSExtProc)
(PRESENTATION = RO)
If there is any thing wrong in the above configuration pls correct me.
cheers
RRK

That looks like the default configuration.
I can not test it here, but what I can see is, that your HOST=localhost.localdomain is not correct. Try it with the loopback interface 127.0.0.1 or give your FQDN and your hostname or your IP-Address.
If you look at your LISTENER configuration, there you have KEY=EXTPROC0 whereas in the tnsnames.ora file you have KEY=EXTPROC, so this doesn't match.
Just to name the two most obvious anomalies.

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FORM ENTRY_NEU USING ENT_RETCO ENT_SCREEN.
XSCREEN = ENT_SCREEN.
IF NAST-AENDE EQ SPACE.
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ELSE.
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ENDIF.
CLEAR: XFZ, XOFFEN, XLMAHN, XLPET.
*- Anstoß Verarbeitung -
CLEAR ENT_RETCO.
PERFORM LESEN USING NAST.
MOVE RETCO TO ENT_RETCO.
ENDFORM.
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INCLUDE FM06PE02                                                   *
form entry_neu using ent_retco ent_screen.
data: l_druvo like t166k-druvo,
        l_nast like nast,
        l_from_memory,
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else.
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endif.
call function 'ME_READ_PO_FOR_PRINTING'
       exporting
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            cx_from_memory = l_from_memory.
check ent_retco eq 0.
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            ix_druvo       = l_druvo
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Rick

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********Logic to Fetch Open items GL Account**************
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binary search.
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Edited by: AtulMohan Mishra on Feb 9, 2011 11:22 AM

Hi,
It is very important that you SORT the internal table before you do a READ with Binary Search.
SORT TB_ZOCFSKB1 BY /BIC/ZMCFBUKRS /BIC/ZMCFSAKNR.
You are sure to miss results unless you do.

External routine problem

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