CBR1057I Command rejected. Invalid L= operand.

Explanation
 The operator has entered a command in one of the
following forms:  DISPLAY SMS,operands,L=operand
MODIFY OAM,DISPLAY,operands,L=operand
LIBRARY verb,operands,L=operand

 The location operand
has an invalid format. The valid location operand formats are: L=a,
where a is an alphabetic character; or L=name-a or L=name, where name
is an 2–8 character console name, a is an alphabetic character
and - is a dash/hyphen.

System action
 The command is rejected.

Operator response
 Determine the cause of the error; then enter
a command with a valid location operand.

Source
 Object Access Method (OAM)

Routing Code
 -

Descriptor Code
 5