ID:12861 Can't place combinational node "<name>" -- node appears in a carry chain

CAUSE: The specified combinational node, which appears in a carry chain, must be placed within an Adaptive Logic Module (ALM). However, the Fitter cannot place the specified combinational node within an ALM.

ACTION: Refer to the following messages for the reason why the carry chain could not be placed and modify the combinational nodes in the carry chain so that the combinational node can be placed legally within an ALM.