Main Form Locked After Clicking on Subform

[hhzyousafi]

I have a Main Form which is essentially the based on my child table called tblTaskHistory. The Main Form has a subForm which is based on the parent table called tblTasks. I am using SQL queries to feed the combo box recordsource that is located on the Main Form. The After Update for the combo box populates the subForm which allows the users to look at details of a task before he/she "accepts" it. The problem is that when he/she clicks on the subForm to view the details of the task the Main Form locks up. The user, after interacting with the subForm, cannot make an edit on Main Form now. The user has to close the Main Form and then reopen it to perform the "accept" action. The form works absolutely as intended - that is if the user doesn't click on the subForm - however once he/she clicks on the subForm the Main Form locks up. What am I missing here?

 

[RuralGuy]

Not easy to guess here. Any chance you can post a sample db that exhibits the symptom?