I have built a quite large controller using the FPGA module 1.1, LabVIEW 7.1.1, and PXI-7831R. When I build the program using the embeded project manager, I keep getting the Overmapped error from MULT18x18 multiplier. The message look like this (58 out of 40 145% (OVERMAPPED)). From the knowledge base I know that the number of multiplier in FPGA is limited to 40 but I must have 21 pairs of 32 bit multiplication .
I did try to change multiplier to Compound Arithmetic multiplications as suggested in the knowledge base but the number of MULT18X18s are not decrease. What I have done wrong ? Are there any other ways to solve the problem ? I have spare space in other kinds of gates .. only this one gives me problems.
Thanks in advance..