Qlik Sense ODAG API Developers rename app

[jroc26]

I am trying to see if there’s a way to set the Odag template app names dynamically using a variable or field that’s present in the sheet. 

I are using the ODAG Qlik Sense API,  but I have to make 2 API calls before I call generateApp in order to dynamically set the app name everytime.

I found this info https://help.qlik.com/en-US/sense-developer/June2019/apis/ODAGserviceAPI/index.html?page=53

that I was trying to use to set the properties initial when the sheet is loaded that would populate the name from a field or variable.
But I can’t seem to get the syntax working.

Here’s my code, see below.

What I would like is an expression in that second params such as ‘$(variable_name)’ or $(‘fieldName1’), the API

says you can use expressions for the values, https://help.qlik.com/en-US/sense-developer/June2019/apis/ODAGserviceAPI/index.html?page=26 

but I keep getting the following error

1. errType: "Calling Application"
2. message: "Validation failed on the property: 'genAppName'. Reason: The parameter specified for the link property at genAppName.params[1] is not valid: $(Upper('JOJOJO')).."
3. msgCode: "ODAG-ERR-1010"
4. statusCode: 400