To the best of my knowledge, this is not a predefined Calibre check -- you'll need to ask the group who provided your rules what they mean by it. A quick Google search showed there are a number of things which you do not want to have cross well boundaries; the term could refer to any of them.
If this is a tool other than Calibre, would you please provide more details?
Thank you for the reply. Actually i'm refering it to IC Compiler (SOC_design). A power well triangle is applied in every chip design which is the boundaries for different type of cell. For example, cell that will turn off first when you shut down your system or cell that will be always in on state. Isolation of a signal is needed if the signal was driven from a partition with a different power plane to the load of the signal. So i'm actually looking for a proper documentation on this cross well violation and some solutions if you encounter one.
IC Compiler is a Synopsys product. It is true that Calibre Interactive can be integrated with it, but if the error is coming from IC Compiler it could be one of its checks. If this is showing up as a (Calibre) DRC or PERC error, look in the SVRF rule file for the exact check. I can help you interpret SVRF rule checks if you post the appropriate lines, but really the best people to help with it are the ones providing the rules -- usually a foundry or sometimes your company's CAD group. I can tell you what the code says, but they could tell you why it is there and maybe some potential fixes.
If you are working at a university or otherwise can't get direct support for the PDK you are using, a good forum is EDA Board - http://www.edaboard.com/forum.php . I've seen engineers post questions about errors they are getting; usually the first thing people ask is which foundry/process and what software & version.
Sorry I can't help more -- the only thing I know about IC Compiler is what we list in the Calibre Interactive manual for tool integration.
Thank you for the concern. I will try to do things like you said and maybe if i can get a solution i will post it here.