We are using version 6.10

That's in accept screen field

Are you filling the screen field (is it an entry field or character screen field) with a value that you do not want copied? If you are using an entry-field, you could disable the field until you want the customer to fill it with a new value, then customer fills it and then when they leave the field you could disable it again. While the field is active the control-c would still be able to copy the value. If you want the customer to input a value that cannot be copied, you could make the entry field have the SECURE property, then when they type in a value it is only known to the COBOL data item and cannot be copied from the screen.

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