Communication Link Failure COMM RC=0XC

Hi!

On some computers when connecting via ODBC I am getting a 
Communication Link Failure COMM RC=0XC
        and sometimes
Communication Link Failure COMM RC=0X3
        error messages...

I looked up some IBM APARs and found one (II09468) which said:
COMMON PROBLEMS WITH THE 32 BIT ODBC DRIVER
___________________________________________
 
Problem:
 "I can't connect with the ODBC driver"
 
Resolution:
 See II09599 ODBC Troubleshooting: Section 1
 Unable to Connect to the AS/400; Section 3.1
 Connection Errors.
 Things to Check on the AS/400 System:
   Communication Link Failure COMM RC=0XC
   Communication Link Failure COMM RC=0X3
 
I looked through the II09599 APAR but didn't find anything to help me
solve 0xC and 0x3 return code (?) problems.

So what is the problem? How do I "check it on the AS/400 system"?

                                                Best regards, Juris.
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