partial selection turned off while descending

It reinitializes it each time. So it may be set via cdsenv:

envSetVal("layout" "partialSelect" 'boolean t)
envSetVal("layout" "filterSize" 'float 0.0)

but you also need to see if either are set as properties on the library or technology library (go over the library in the library manager, do RMB-> Properties, and look for viewProps and hit the EXPAND button if there is one. Do the same for maskLayout within the resulting form, and then you might find filterSize  and potentially partialSelect. It's also possible that these are set as cellView properties (do File->Properties with the cellView open to check, and look on the properties page).

Regards,

Andrew.

Hi Andrew,

               It works perfectly . 

I have another question related to the topic. Is there any function to get all the registered variables ? 

I require this so that I can set other environmental  variables for my requirement.

Please help.

In IC615 you can use the search assistant (WIndow->Assistants->Search in the schematic (or layout) editors to search for cdsenv  variables. I don't think there's a public function to directly return them - you could use envStoreEnv() to write them to a file and then parse this.

You can also go to <ICinstDir>/tools/dfII/etc/tools and look in */.cdsenv which is where all the cdsenv vars are registered. Some of these are private (there is a fifth column in the file which has t if it is private) - the private vars are liable to change and so should not be used.

Regards,

Andrew.

 Thanks Andrew,

envStoreEnv() does the job for me.