| CAUSE: | In a Boolean expression in a Text Design File (.tdf), you used an arithmetic or logical operation that contains the specified group or node, which has a don't care (X) value. The arithmetic or logical operation does not work if any of its groups or nodes have don't care values. |
| ACTION: | Use only fully defined values (that is, values without don't care bits) in the arithmetic or logical operation. |
See also:
Defining Groups
Group Ranges & Subranges
Groups
Implementing Boolean Expressions & Equations
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