Description of Problem:
I read in the pam_unix module documentation that this module could 
update nis passwords, when the "nis" option is supplied. But instead, it produces an error (see 
below).

Version-Release number of selected component: pam-0.75-19

How 
Reproducible:
Always

Steps to Reproduce:
1. Set /etc/pam.d/passwd to:
password   
required     /lib/security/pam_stack.so service=system-auth

2. Set /etc/pam.d/system-auth 
to:
password    required      /lib/security/pam_cracklib.so retry=3 type=
password    sufficient    
/lib/security/pam_unix.so use_authtok md5 shadow nis
password    required      
/lib/security/pam_deny.so

3. try to change an user password :
[root@xxx]# passwd 
xxx

Actual Results:
Output of command 'passwd xxx' :
  Changing password for user xxx
  
New password:
  Retype new password:
  RPC: Can't encode arguments
  The password has not been 
changed on xxx.
  passwd: Failed preliminary check by password service

Expected 
Results:
Updating of the nis shadow map.

Additional Information:
I tried all this on the 
nis master server.
Related packages:	
  ypbind-1.8-1
  ypserv-1.3.12-2
  shadow-utils-
19990827-18