M204.0999
M204.0999 Number %variable used for variable-name variable
A Fixed or Float %variable or a numeric special screen or menu item (Row, Column, Pfkey, Itemid, or Selection) was used to name another %variable through the colon (:) prefix.
For example, if %salary were a fixed
variable, a reference to :%salary produces this message. 
Response: If a variable-name variable is intended, redefine the variable as String, or use a different variable that is already a string. Otherwise, remove the initial colon. Retry the request.
Message attributes:
| RETCODEO=0 | Sets online return code | 
|---|---|
| RETCODEB=4 | Sets batch (single user) return code | 
| CLASS=E | Error class; the message can be suppressed with the X'04' bit setting of the MSGCTL parameter | 
| AUDITER | Writes the message with line type ER to the audit trail | 
| COUNT | Increments the error count (ERCNT) parameter | 
| ECHO | Displays the line that caused the error | 
| COMPILE | Compilation error |