CAUSE: | In a VHDL Design File (.vhd), you used the specified predefined attribute in the specified location, which requires a range. However, the predefined attribute does not specify a range. |
ACTION: | Replace the predefined attribute with a predefined attribute that specifies a range. Or, replace the predefined attribute with a range. |
See also:
Section 14.1 of the IEEE Std 1076-1993 IEEE Standard VHDL Language Reference Manual
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