New Fitter Error

Hi!

I develop a DSP project on Terrasic DE1 board based on Cyclone V GX. My project occupies something about 50% of resources.

I added some functions and got a fitter error during compilation:

Error (170025): Fitter requires that more entities of type LAB be placed in a region than are available in the region

Error (170026): Region "lower-left" corner: X1_Y9; Region "upper-right" corner: X25_Y34

And the reason for this is "bitslip" net from control block to gigabit transceivers (the transceiver control module was designed a few monthes ago and worked well).

Basing on google and altera I tried to solve the error by setting the as GLOBAL SIGNAL in assignment editor, but it was't succesfull.

Thanks for helping me!