DSP48 timing simulation warning???

[lmtg]

at 0 ns(2): Warning: OPMODE Input Warning : The OPMODE UUUUUUU with CARRYINSEL UU to DSP48 instance is invalid.

What is the cause of the above warning?
Can it be ignored or does it cause simulation errors?
How canit be fixed??

Thanks in advance..

 

[alexadmin]

Origin of this message is uninitialized value of input (control) signal of DSP component. Such warnings can be ignored at simulation time = 0 ns or few clock cycles later. If this message appear through and through then it's error which must be fixed.
To remove this warning set initial value for reported signal.