ID:13871 VHDL Block Configuration error at <location>: OPEN keyword cannot be used as index

CAUSE: In a Block Configuration at the specified location in a VHDL Design File (.vhd), you defined the configuration of a block using an index. However, you used the OPEN keyword as the index. You cannot use the OPEN keyword as an index in a Block Configuration.

ACTION: Replace the OPEN keyword with a legal index for the Block Configuration.