Hi Could you please help me out in debugging the analog Errors while simulating a VHDLAMS transistor level designs. The error from spectre looks like: "Error found by spectre during DC solution estimation, during IC analysis, during transient analysis `amsAnalysis'. Matrix is singular (detected at `tb_output' and `uInv.A1.irn'). ncsim:*E, RNALER: simulation terminated due to analog error" I have no clue how to debug the Problem Thanks in advance. your help is awaited. --Srinivas