The error when doing time simulation in Modelsim

I try to do timing simulation in Modelsim for my design.

In Quartus II, nativelink only supports RTL and GTL simulation. GTL simulation only use .vo or .vho files without .sdo files. Then I try to do timing simulation by myself.

I create a very simple design with only a PLL, then I use nativelink to run GTL simulation, and edit the generated tcl file (.do) to do timing simulation, however, it gives the error as showed in Error message：

* Error: PLL_Simu_6_1200mv_0c_v_slow.sdo(29): near "(": syntax error, unexpected '(', expecting class

Does anybody confront this error before?

Thanks very much.