"cannot place 2 nodes into a single alm" error message while doing signalProbe

I face the same issue.

It is design dependant unfortunately.

I'm trying other synthesis/fitter options to see how I get signal probe working again.

If you found anything, let me know.

Altera was not able to reproduce at their side with simple test case.

Note: I must stick to version 13.1 as further versions of Quartus does not support the stratix III FPGA anymore.