calibreview,post- layout simulation,error

Leonhardt

用calibre+cadence进行后仿真,
calibre PEX提取寄生参数,
LVS通过了,
并且生成了calibre view，用此view来进行后仿真，一直报错，如下所示。

Error found by spectre in `mphamacro':`I1_M27', in `P183_2_4227A_calibre':`I1',
        during hierarchy flattening.
    I1.I1_M27.dsbf_pa of mphamacro: Value of `perim' should be greater than or
        equal to zero.
Internal error found in spectre in `mphamacro':`I1_M27', in
        `P183_2_4227A_calibre':`I1', during hierarchy flattening, during
        circuit read-in.  Please run `getSpectreFiles' or send the netlist, the
        spectre log file, the behavioral model files, and any other information
        that can help identify the problem to support@cadence.com.
    Error detected in file `ipsm.c' at line 219.
    Assertion failed.

一直查不出原因，望不吝指教。