I set up to measure the current density for the IO to power. But it look a bit messy like in the picture I snipped. The density is not shown in all metal path and it has some fracture.
How do I fix this problem ?
The screen capture by itself doesn't provide meaningful information as there is no way to tell what any of the structures are. To be able to provide any useful feedback to fix the issue, one would need to know what the precise design rule is and what your rule code currently contains that tries to check the rule.
For this comment: "The density is not shown in all metal path and it has some fracture," CD results are only output for paths that meet the coded rule constraints. Unless your rules are set up to output all CD values on all metal between your sources and sinks, you won't have results on all metal paths. I'm not sure "fracture" means.
Retrieving data ...