normal I/O to PLL input

[Altera_Forum]

HI, 

  in my design i want to use normal i/o as PLL input in STARTIX2 device. in place and route time it showing error like "PLL input must be A CLKIN pin". is there a any alternative way to resolve this problem.  design change is not possible.   i studied "clocked control block" can use for driving the PLL. but its not working.  please tell me how to resolve this problem.   Thanks & regards --Ramanand

[Altera_Forum]

please give me reply at least yes or no. 

 Thanks

[Altera_Forum]

The answer is very clear in the Stratix II hardware manual. It doesn't work.