Hi Tamara,

First of all, please clarify what version of TestComplete you are 
actually using? Is it TestComplete 5.15 (the latest version of 
TestComplete 5) or TestComplete 7.20? If you are using TestComplete 
7.20, please update to TestComplete 7.50 and check whether the behavior 
persists. If it does, please zip your entire project suite folder along 
with the log of the failed test execution and send us the archive via 
our Contact Support form (http://www.automatedqa.com/support/message). 
Make sure that messages in your log correspond to the latest version of 
your tests.

BTW, it may appear that the behavior is actually the expected behavior 
caused by the changes in your application, and you just need to change 
your Name Mapping scheme to meet the new recognition criteria.

--
Best regards,
Allen - AQA Support



Tamara wrote:
> We are using TestComplete 5.2. Before this error everything was working fine,
> but now after some program modifications(now our exe is calling .NET assembly
> which is calling WCF service) we are getting this error "Unable to find the
> object {541651.....}". It seems that system can't find the object(for ex.
> button) to click.
> We were wondering if this problem is known error ?
> Is it possible that the reason of the error is the old version of TestComplete
> ?
>
> Thank you in advance.
> We will appreciate any ideas relating to this issue.
>