IBM0724S
ONCODE=oncode-value Z=+1i or Z=-1i in ATAN(Z) or Z=+1 or Z=-1 in ATANH(Z).

Explanation

Either the complex floating-point argument of the ATAN built-in function had the value of +1i or -1i, or the complex floating-point argument of the ATANH built-in function has the value +1 or -1. ONCODEs associated with this message are:
  • 1558 Complex short floating-point argument
  • 1559 Complex long floating-point argument
  • 1564 Complex extended floating-point argument

System action

The ERROR condition is raised.

Programmer response

Modify the program so the complex floating-point argument of ATAN never has the value of +1i or -1i, or the complex floating-point argument of the ATANH built-in function never has the value +1 or -1.

Symbolic Feedback Code

IBM0MK