Hi @EMohaisen ,
Could you show me how do you set Var_HMT?
Is this choice field single choice?
I've made a similar test but not met the error that you showed.
Here's my test: (my choice field is single choice)
1)Set the button's OnSelect:
Set(Var_HMT,"In Porgress")
2)Set the drop down's Items:
Choices(listname.columnname)
Set the drop down's Default to empty
Set the data crad's Update:
If(!IsBlank(Var_HMT),{Value:Var_HMT},DataCardValue27.Selected)
Then if I cilck the button, the choice's field will update with the "In Porgress" value.
Best regards,
Community Support Team _ Phoebe Liu