ID:308037 (Critical) <text>. Found <number> combinational loop(s) related to this rule.

CAUSE: In the current design, the Design Assistant found the specified number of combinational loops, which is combinational logic that drives itself without being synchronized by a register. However, a combinational loop can cause significant stability and reliability problems in a design because its behavior often depends on the relative propagation delays of its logic, causing the combinational loop to behave differently under different operation conditions. In general, combinational loops circuits are asynchronous, and EDA tools operate better with synchronous circuits. The submessage(s) of this message list the combinational loop(s) that the Design Assistant found.

ACTION: Make sure the design does not contain any combinational loops.