When replacing an ST-code that is based on a template, a dialog with an error icon but without an error text might be displayed

Symptom:

If you have inserted an ST-code by using a template of content assist and you replace this ST-code by one of a new template, a dialog might be displayed. This dialog contains an error icon but no error text. After you confirm the dialog, only the first characters of the ST-code is inserted.
This problem has been observed when ST-code has been inserted by using the template for, this code has been selected and the template while in content assist has been selected. After confirming the dialog, only whi has been inserted.

Solution:

First delete the ST-code already inserted. Then insert the new template of content assist.