ASMA183E Operand 3 must be absolute, 0-255; ignored

Explanation
If there is another message with this statement, this message is
advisory. If this message appears alone, the third operand of an EQU
statement contains one of the following errors: 

It is not an absolute term or expression whose value is within
the range of 0 to 255

It contains a symbol that is not previously defined

It is circularly defined

It is too complex; for example, it causes an arithmetic overflow
during evaluation.

System action
The third operand is ignored, and the type attribute of the EQU
statement is set to U.

Programmer response
Correct the error if it exists. Paired relocatable symbols in different
LOCTRs, even though in the same CSECT, are not valid where an absolute,
predefined value is required.

Severity
8