First off, welcome to the forums! Thanks for your post.Originally posted in cdnusers.org by BobD
No, cap tables are *not* a MUST. If there is no cap table available, FE will *not* use a wireload model. It will derive parasitics from actual route topologies using approximations made from whatever information is available in the technology section of your LEF file to determine resistances and capacitances.
Whether this is sufficient to accurately model your 0.13 process depends on whether you're using FE as a prototyping tool -or- as an implementation tool. If prototyping, it may very well be sufficient. If implementation probably not.
In general, it is always best to run with a cap table, but situations do arise where they're not available yet and we want work to proceed. Cap tables can be created using the FE command "generateCapTbl". The command takes an ICT file as input (which describes the process stack information, which usually comes from your process provider) and produces a cap table. Just thought I'd mention those details in case it wasn't clear in general where this information should come from.
Hope this helps,