update_net_connectivity

update_net_connectivity 
-all | -net s_netName | -set d_setObj 
[ -exclude_net {s_netName …} ] 
[ -exclude_set d_setObj ] 
[ -exclude_type {[power][ground][clock]} ] 
[ -silent [ true | false ] ]

Description

Checks for opens and shorts in the design by tracing through the shapes. This physical connectivity is compared against the connectivity provided by the network in the design, such as the original Design Exchange Format (DEF) file. Space-based Router and Chip Optimizer will display guides in the artwork window connecting the nearest points for any opens that are found. You can choose to evaluate the entire design, specific nets, or sets.

You can also use the envSetVal( "ia" "globalIncludePreroutes" 'boolean t) in the .cdsinit file to enable ECO flow routing for using the existing floating pre-routes on a net and route the opens on the net.

The GUI equivalent for this command is Verify—Connectivity.

Arguments

`-all`	Checks the connectivity of all nets in the active window.
`-exclude_net` {s_netName …}
	Excludes the named nets from processing.
`-exclude_set` d_setObj	Excludes nets in the given set from processing.
`-exclude_type` {`[power][ground][clock]`}
	Excludes nets of the specified types from processing.
`-net` s_netName	Specifies the name of the net to operate on.
`-set` d_setObj	Checks the connectivity on nets in the set.
`-silent [ true \| false ]`
	When `true`, disables printing of information messages. Default: `false`

Value Returned

`0`	Indicates the command completed. Results are reported in the Transcript area.
`-1`	The command did not run due to a syntax error or when more than one shape is selected.

Examples

The following example checks the connectivity for the entire cellview, excluding the VDD and GND nets.

update_net_connectivity -all -exclude_net { VDD GND }

In this example, the following is output to the Transcript area:

#Net GND was ignored.
#Net VDD was ignored.
#Connectivity updated on 8458 net(s), 3 guide(s) created!
#Checked 0 shapes, 17348 instTerms, 198 terms and 85 routes.
#Total CPU time: 0.3 seconds (0.3 user, 0.0 kernel)
0

Virtuoso Space-based Router Command Reference
Product Version IC23.1, September 2023