switch case on workflow for lookup select box

[Elakkiya A]

I am trying to create a switch case condition on workflow for a variable with type as lookup select box.

But it's not getting the correct value from that lookup table.

[Brad Bowman · Accepted solution]

From the wf_activity_definition record for the Switch activity:

Keep in mind: 
*The Switch activity works when the selected variable or field is a type of choice list , so that the Switch activity uses all the choices as possible transition paths.  
*You can use service catalog variables as the selected 'Variable'.
*ServiceNow recommends only selecting choice list or reference type fields in the 'Variable' or 'Field' activity variables.

So a Lookup Select Box type variable is not supported with this activity, and as you discovered, does not detect the values.  You could try to manually add a Condition for each value - just use the syntax:

activity.result == 'value'

in the Condition field

If the Switch doesn't detect the Lookup Select Box value and follow the correct condition/path as the workflow is executing, another option is to use a Run Script activity setting the activity.result for each value

if (current.variables.var_name == 'value1') {
    activity.result = 'value1';
} else if (current.variables.var_name == 'value2') {
    activity.result = 'value2';
}...

, then add the same Conditions to this activity