Showing results for 
Search instead for 
Did you mean: 
Level 8

MaxLength Circular Reference Issue



I'm running into an issue with a formula and it should be super simple but I cannot get it to work. I have a text field, TextInput2 and I want to change the MaxLength based on what the text in the field starts with. So, in the MaxLength field I entered this formula:




Again, pretty simple and it should do exactly what I need it to. Except that "This rule creates a circular reference..." error. Any tips on how to overcome this? The field is an ID number field for two different types of ID numbers and based on the way it starts, we automatically know which type it is. I just want to tell it if it's type A it should be 10 characters and if it's type B it should be 8 characters. Thanks.

8-15-2018 10-43-36 AM.png8-15-2018 10-43-58 AM.png

Super User
Super User

Re: MaxLength Circular Reference Issue

Hi Rodi,


A possible solution is to add a Radio Control and set its Items property to ["PEO","###"].


Set the default of the textinput to If(Radio1.Selected.Value="PEO","PEO-","")

Set the MaxLength to If(Radio1.Selected.Value="PEO",10,8)


This avoids the circular reference and helps the users by loading PEO- into the TextInput box and allowing them to use the keypad in both cases.Maxlength.PNG




Community Support Team
Community Support Team

Re: MaxLength Circular Reference Issue

Hi @rodieremix,



I think the message should be clear enough to explain the situation.

As the Maxlength is used to define the actual string entered, it is not allowed to change its value based on the TextInput.Text.


The workaorund that would work should be providing additional reference for the MaxLength to determine the proper value, based on other control, or data has no relationship with the TextInput.Text property.

There is no methods that could change the Maxlength automatically, based on what I know.






Community Support Team _ Michael Shao
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
Super User
Super User

Re: MaxLength Circular Reference Issue

Isn't this pretty much what I came up with?

Level 8

Re: MaxLength Circular Reference Issue

Thank you both for the input. 

Helpful resources

New Ranks and Rank Icons in April

'New Ranks and Rank Icons in April

Read the announcement for more information!

Better Together’ Contest Finalists Announced!

'Better Together’ Contest Finalists Announced!

Congrats to the finalists of our ‘Better Together’-themed T-shirt design contest! Click for the top entries.

Power Platform 2019 release wave 2 plan

Power Platform 2019 release wave 2 plan

Features releasing from October 2019 through March 2020


Community Summit North America

Innovate, Collaborate, Grow - The top training and networking event across the globe for Microsoft Business Applications

Top Solution Authors
Top Kudoed Authors
Users online (9,618)