Sometimes when click on Customize button, the QnE program will prompt errors : Access Violation at address xxxx in module xxxx. Read of address xxxxx
The solution is Exit the Customize & Transaction Screens and access again.
An access violation at anywhere near adress '00000000' indicates a null pointer access. You're using something before it's ever been created, most likely, or after it's been Free And Ni.
A lot of times this is caused by accessing a component in the wrong place during form creation, or by having your main form try and access something in a datamodule that hasn't been created yet.