Looks strange indeed... Have you prepared your tested application as per https://support.smartbear.com/testcomplete/docs/app-testing/desktop/delphi/index.html requirements? Is debug info accessible to TestComplete ?
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We checked about Compiling Delphi 10 Applications With Debug Information and was found that we need to turn off the Link with runtime packages option in the Packages | Runtime Packages category.
We cannot to do this. So we still need solution for our problem. We don't see all avaliable properties
Please see attached