multi-process problem

[judpoir]

Hi,
I'm actually using Mentor Graphics for my project and here is my problem :
I have a design entity which contains a few processes. There is a "master process" which gives the hand (using an appropriate handshaking) to one and only one slave process (thanks to mutually exclusive conditions). Each process has to write something to the same output of the design entity (but only one is active at the same time as I explain above). This works fine with compilation, simulation but Leonardo (synthesis tool of Mentor Graphics) doesn't want to synthesize it!
Is there another way to drive a same output from multiple processes of a same design entity ?

Thanks a lot

 

[SMundschau]

Have the master process control a mux for the output signal along with enabling the slave processes.

entity_output <= process1_output when process1_enable = 1
   else process2_output when process2_enable = 1
   else process3_output when process3_enable = 1
   else process4_output;