Schematic instance/symbol swap error

I am working on a script to swap instance in a schematic but I get an error when I do the instance  swap

command I use to swap the instances

leReplaceAnyInstMaster(inst lName cName inst~>viewName)

The message I get in the CIW

*WARNING* (DEBASE-102124): (deCheckTier-1) Command needs an application of tier "better", which is higher
than the "good" tier of application "Schematics"

Its a warning but the instance is not being replaced.

If I run the script with the cellview open in XL mode I dont get the error.

Is there a way to run the leReplaceAnyInstMaster with lxRunCmdInVXL or open the schematic cellview in xl mode?

Paul