Power Platform Community Forum Thread Details

ModelDrivenFormIntegration control giving error - not retrieving data in embedded canvas app

I created a canvas app first, then added to a solution in PowerApps. Got the

 
ModelDrivenFormIntegration control in the app by using app url and appending &source=ModelDrivenFormIntegration&is-hosted=true.
 
I Could not get it by clicking on the Customize button in the App Properties window in the Main form, or by switching to classic view etc
 
When I added the canvas app to Main form I entered first field (Bind to table Column) as Contact,
Entered the App Name as unique name of App -,
Entered the App Id (GUID) which I got from the App details. 
 
I added this bit in the Datarefresh event of this control
 
Refresh(Contacts);
Set(ContactId, First(ModelDrivenFormIntegration.Data).ItemId);
tried to get the contact object
 
Set(Contact, LookUp(Contacts, 'Contact (contactid)'=First([@ModelDrivenFormIntegration].Data).ItemId));
 
I get error on ItemId part - Name isn't valid, ItemId isn't recognized. Incompatible types of comparison etc. 
 
I tried this as well in DataRefresh
 
Set(ContactId, ModelDrivenFormIntegration.Item.'Contact (contactid)'); 
This above one doesn't give error but doesn't show me the value
 
I read many posts and tried the above in App start as well, but it doesn't get the value, 
 
I didn't know of any way of testing this bit in preview. I still published it. 
 
When I refresh the Main form where this app is embedded I don't see the value of Id coming and galleries are not getting populated. 
 
This is the first time I am doing this, so maybe I am doing somethings wrong. 
 
Can you please guide me on how to get the Id of the record this app is embedded in, into the app so it can run all the initial power flows to get the data into the app. 
 
Thanks a lot 
Nalina