IBM0564S

Explanation
 An attempt was made to assign a value to an event
variable while it was still associated with an input/output operation.
 DCL X FILE RECORD INPUT UNBUFFERED
ENV(BLKSIZE(80) RECSIZE(80) F);
DCL Y CHAR(80);
DCL (Z,Z1) EVENT;
READ FILE(X) INTO(Y) EVENT(Z);
Z = Z1;

 The ONCODE associated with this message
is 3906.

System action
 The ERROR condition is raised.

Programmer response
 Modify the program so that the event variable
used as the target in the assignment, or as the argument of the COMPLETION
pseudovariable, is not the same event variable associated with an
input/output operation. Alternatively, include a WAIT statement to
prevent this statement from running until the active event is complete.

Symbolic Feedback Code
 IBM0HK