Double-click not working: We have simplified transaction IW43 with GuiXT. This works very well, but we now realize that the "drill down action" (i.e. double-clicking on the "Order" number field on the IW43 screen) no longer works anymore if GuiXT and our script are active. What could be the reason? I include our script for you to see.

Deleting a pushbutton in a toolbar also disables the corresponding function key.

In your case,

del P[Display object]

disables function code F2, and the SAP system handles a double click in a field as F2.

There is an additional option in the del command

del P[Display object] -keepfunctioncode

that leaves the F2 / double click enabled and still deletes the toolbar button.