Problem:

"You are trying to use a data-name which you have not declared, or which you have misspelled."

This error occurs at compile time.  The unknown operand is listed in the message.  

Resolution:

First insure that the operand is spelled correctly.

Check the compiler directives used to compile the program. These may be listed in the compile command or be included from a directives file such as COBOPT.  There is a directive "REMOVE", that tells the compiler that the specified word is no longer to be considered as a COBOL Reserved Word.      If there is a   corresponding statement "REMOVE(XXXXXX)" take out this directive and try the compile again.

Check with you Systems Administrator to find out why the command was removed in the first place.