COBRT104 Null file name used in a file operation (Fatal)

You specified a data-name for a file-name instead of a literal, and the data item contained only spaces when you tried to open the file.

Alternatively, you have attempted to do a CALL dataname in which the dataname has at least one leading space character.

Resolution:

Recode your program specifying the correct file-name.

Ensure the target program name is space terminated.