g_form.setvalue isnt working for lookup selectbox in portal

[Kumar38]

I  have a client script that run on "UI Type = All" and I'm setting values for multiple fields. All of them are working as expected except a lookup select box [Doesn't work only in portal]

[Anurag Tripathi]

Does the same work on native ui?

can you show the field / script?

[Kumar38]

It works on native UI. 

g_form.setValue('environment', rd_environment.toString()); //Tried with toString and without tostring

[Anurag Tripathi]

Add an alert  on this value and see what you get on the portal vs native ui

 rd_environment.toString()

[Kumar38]

They both are printing same value [prod]