Ultrasim DSPF Stitching Failed

Hi,

Recently, I want to run post-layout simulation using Ultrasim, futher more I want to using xrun+ultrasim to run co-sim.

But from the simulation results, it seems DSPF stitching failed, because the results are the same regardless of whether stitching is enabled or not.

When I check ADE->Simulation->DSPF Log, some errors are as follows:

ERROR  (STITCH-0040)(:38434) : Element I_counter.xi_buf_delay.xi24.xmn0 not found.

I can find  I_counter.xi_buf_delay.xi24.xmn0 instance in spf file and schematic, why the stitching failed?

Is there any other post-layout simulation method using Ultrasim?

Thanks and regards,

Chao