I have the very same problem. see http://www.cadence.com/community/forums/T/25128.aspx
The calculated impedance is far from what it should be ...
What version and ISR level are you at? There were some updates related to impedance in some of the ISR's.
EMA Design Automation
Was at hot fix 38, updated to hot fix 40.
Issue still exists.
Note: Opened same database on 2 other computers, issue disappears. 1 computer is a windows based with hotfix 40 applied, other computer is a linix base at hotfix 17.
Could this be hardware (PC) related?
Opened a Sr, and the Cadence team does not see this issue.
Thanks for feedback
If you are getting different results on different machines, try:
- deleting your local cache for the field solver (delete the file interconn.iml and then reopen the design)
- see if you have anything solver related in your env file (like trapezoidal_angle_in_degree)
Thanks for the reply:
The database is on a network drive, which I open from all 3 machines (2 windows based - 1 linix based).
I deleted the interconn.iml file in the network drive, made no differnce.
Where would the local chache be located? Doing a search on my local disc, lots of interconn.iml files......