M204.0634 Trouble with disk I/O, possible incorrect DD card, file="token"
Model 204 encountered an error trying to read or write to the file. This often results from issuing an OPEN command for a file that has not been created.
Response: Check the JCL and the data set for errors.
|Sets online return code
|Sets batch (single user) return code
|Error class; the message can be suppressed with the X'04' bit setting of the MSGCTL parameter
|Writes the message with line type ER to the audit trail
|Increments the error count (ERCNT) parameter
|Displays the line that caused the error