Hi Vladimir,
When the installation starts, there are several processes having the same "msiexec" name, and the process taken by TestComplete can fail to contain the needed window. To avoid this problem, you can modify the NameMapping scheme and specify the required children for the needed process. See the
"Specifying Child Objects Required for Mapped Object Identification" article for details. Also, you need to avoid using the Index property to map the installation's main form, and add the
Visible property equal to
True to the mapping criteria. Please note that the value of the Caption property for the main form can change. You can use wildcards to make your NameMapping scheme more reliable.
Also, this question was discussed on the forum several times. You can refer to the search results to find some useful information: