Can run simulation with MMSIM72 but cannot run with MMSIM62

 Hi,

in my lab we use two linux server (5.2) for cedence (5.10.41....).

For running ADE simulator, one machine use MMSIM72, and the other one uses MMSIM62.

Edit: For a certain PDK,

I can run simulation successfully with MMSIM72, but running it with MMSIM62 always gives convergence errors, like this:

~~~~~~~~~~~~~

Error found by spectre during IC analysis, during transient analysis `tran'.
    ERROR (SPECTRE-16080): No DC solution found (no convergence). 

The values for those nodes that did not converge on the last Newton iteration are given below.  The manner in which the convergence criteria were not satisfied is also given.
            Failed test: | Value | > RelTol*Ref + AbsTol

    V(CLK) = 0 V
        residue too large: | -12 uA | > 60.0001 nA + 1 pA

******************
DC Analysis `dcOp'
******************

Error found by spectre during DC analysis `dcOp'.
    ERROR (SPECTRE-16041): Analysis was skipped due to inability to compute operating point.
Warning from spectre during DC analysis `dcOp'.
    WARNING (SPECTRE-16518): Arithmetic exception in analysis `dcOp' .

~~~~~~~~~~~~~ 

My question: is using MMSIM72 the only thing I can do to solve this problem?

best regards,

sigit