Showing results for 
Search instead for 
Did you mean: 
Frequent Visitor

Problem with Forms Pro and FLOW



i have a Problem that i receive every time error 400 if i create a FLOW for an Forms PRO Form.


"ErrorMessage": "System.AggregateException: One or more errors occurred. ---> System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at Microsoft.Forms.Pro.ApiFacade.RequestHandlers.SendEmailsForFlowRequestHandler.<ParseRequestData>d__11.MoveNext()\r\n   --- End of inner exception stack trace ---\r\n   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)\r\n   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)\r\n   at System.Threading.Tasks.Task`1.get_Result()\r\n   at Microsoft.Forms.Pro.ApiFacade.RequestHandlers.SendEmailsForFlowRequestHandler.DoValidate(HttpRequestContext requestContext)\r\n---> (Inner Exception #0) System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at Microsoft.Forms.Pro.ApiFacade.RequestHandlers.SendEmailsForFlowRequestHandler.<ParseRequestData>d__11.MoveNext()<---\r\n"
When i try to start an normal TRIGGER TEST.
When i create the FLOW from Forms PRO it enters this KEY as an Survey.
In Forms PRO the FLOW will be identified for my Survay!!!!!
But when i try to look to the lookup in FLow i found nothing...
Any Ideas? Forms Pro was not operable at this time!
Resident Rockstar
Resident Rockstar

Hi @thomasczerwinsk , thank you for your post in the Flow Community.


I was wondering, could you post pictures of your complete Flow and I will try and recreate this please?


If you have found my post helpful, please mark thumbs up.


Any other questions, just ask.


Thanks, Alan


Did I answer your question? Mark my post as a solution!

Proud to be a Flownaut!

I experience the same issue across multiple environments. I am trying to send a survey based on a D365 record being updated.


It occurs across multiple tenants and also while using the Flow templates unmodified.


Please find screenshots below - 


The error when I try to select a templateThe error when I try to select a templateAdding a custom value of the survey ID (as used in the Flow templates)Adding a custom value of the survey ID (as used in the Flow templates)The error experienced when tested in my FlowThe error experienced when tested in my FlowThe error experienced when using the Flow templateThe error experienced when using the Flow template

New Member

Seeing the same errors when using "Forms Pro" and "Dynamcis 365".

Anyone got to the bottom of this yet?

I have the same problem.

I'm hoping someone soon will reply with the magic solution Smiley Happy

I assume no one has had any break throughs with this?

Sorry, I haven't.


I think it's got something to do with the environment Forms Pro is initially installed on.


My findings are that in tenants where I've used Forms (the original version) before registering for the Forms Pro preview are unaffected. Also, on the tenants that are affected - I am experiencing other strange issues e.g. I can create a new model driven app but when I try to save it I get an error saying that the appmodule ID doesn't exist. This suggests that it may be trying to save it to a different envioronment than it was created in. It's a known issue Microsoft are trying to address.


Sorry, this doesn't resolve anything but these are just my observations.

Community Support
Community Support

Helpful resources

UG GA Amplification 768x460.png

Launching new user group features

Learn how to create your own user groups today!

Community Connections 768x460.jpg

Community & How To Videos

Check out the new Power Platform Community Connections gallery!

M365 768x460.jpg

Microsoft 365 Collaboration Conference | December 7–9, 2021

Join us, in-person, December 7–9 in Las Vegas, for the largest gathering of the Microsoft community in the world.

Users online (1,124)