It is as if someone is pressing the F5 function key.
Using ladder it is trying to place an open coil where-ever the cursor is on the screen. Also any right mouse click or double click will try to enter the coil on the screen.
Using structured text it tries to enter a "For do" loop structure.
Toshiba Tecra PC with installed "Mobile Extension 3"
The source of the problem is the running application "TMEPROP.exe" on a Toshiba Tecra PC. "TMEPROP.exe" is part of the software "Mobile Extension 3".
1. Uninstall "Mobile Extension 3".
2. Open the task manager, sort by name or memory usage. Select the TMEPROP.exe application, right mouse click and end process tree.
Legacy KB System (APS) Data: RESL188180 V1.0, Originally authored by KlSP on 09/21/2007, Last Edited by KlSP on 09/21/2007
Related ranges: Unity Pro