ID:15292 LCELL atom "<name>" must use clk port when in synchronous mode

CAUSE: The specified LCELL atom is in synchronous mode (that is, either the sload port is connected, or the sclr port is connected), but it does not use the clk port. The clk port must be used in synchronous mode. Either the clk port must be connected, or the sload port and the sclr port must be disconnected.

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