Node * determined to be a clock

The code I posted is the only one containing anything related to SM or states.

Also, I tried to comment out parts of code to try to determine which causes the problem. So, if I remove this part:

WITH current_state select
            Data_from_ram<= DataIO WHEN r2,
                        Data_from_ram WHEN OTHERS;

This warning disappears:

--- Quote Start ---

Warning: Node: current_state.r2 was determined to be a clock but was found without an associated clock assignment.

--- Quote End ---

I guess that makes sense, since r2 really was enable signal to that latch.

Further, when I remove this part:

WITH current_state select
            DataIO <= "ZZZZZZZZZZZZZZZZ" WHEN r1 | r2,
                               Data_to_ram WHEN w1 | w2,    
                                         DataIO WHEN OTHERS;

The other warning regarding current_state.idle disappears. Guess this makes more or less sense, but on the other hand, doesn't really explain the warning in the first place :/

Tomorrow will check what changes in rtl netlist and tech map.

Again, thanks for help