IKM064

Explanation
The system detected that a POSITION attribute is specified for
a data item defined by ISUB variables on a base identifier. This is
an error.
In the message text: xxx
The defined item.

System programmer response
If the error recurs and the program is not in error, search problem
reporting data bases for a fix for the problem. If no fix exists,
contact the IBM® Support Center.
Provide all printed output and output data sets related to the problem.

Programmer response
Correct any errors in the PL/I source statement and let the syntax
checker scan it again. Compile the statement as part of a valid program.

Source
Programming Language/I (PL/I)