ID:170063 Cannot place node "<name>" constrained to location <name>, but without the location constraint the Fitter would have found a legal location for this node

CAUSE: You created the specified location assignment, or to create a location assignment to another node that is part of the same DSP block slice, or you used the Global Signal logic option to create a regional clock assignment to a node that feeds any clock port on the nodes of the same DSP block slice as the specified node. However, the Fitter cannot place the specified node because it is constrained to the specified location. This message is a submessage of the message that precedes it in the Messages window and in the Messages section of the Report window.

ACTION: Remove the specified location assignment for the specified node and for all other nodes in the same DSP block slice. If necessary, modify the Global Signal logic option to remove any regional clock assignments to nodes that feed the clock ports on the nodes of the same DSP block slice as the specified node. Click the + icon to expand the list of nodes that cannot be placed in the device.