ContributionsMost RecentMost LikesSolutionsRe: Error "Object doesn't support this property or method" using .Exists of returned object from Find At AlexKaras Thanks for your reply. I had realised that after I posted the messages and I already pointed this out on this thread onstackoverflow: https://stackoverflow.com/questions/55857445/sometimes-exists-property-is-not-supported Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find Thanks TanyaGormunova! I have already had the Auto-wait timeout set to 10000 ms. Also I don't stop test run on error. However, the test will stop if a runtime error occurs like this one. Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find TestComplete 11.31. I could upgrade it to 12.XX but decided to stay with 11.31 as in the past when I upgraded the main version of TestComplete, some of the test scripts would stop working and needed to update. Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find TanyaYatskovska Also as I mentioned in my original post,checking for not null or null does not throw any error but I need to know if checking for not null will guarantee no problem accessing the properties of the objects. I tried this on the niewPort and it worked so far as viewPort has been alwasy found. Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find Delay did not work. I already tried different times of delay even as long as 1000, 2000. I have found a workaround: If I access a different property e.g. Name before access Exists, there is no error at .Exists: The problem is that I need to add this .Name line everywhere before .Exists statements for all of the objects. Hope this helps you to find some clues what might be the cause. Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find ToTanyaGorbunova Wherever GetViewPort(viewArea) is called with viewArea passing in, the viewArea is returned from Find method. e.g. Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find I also posted another problem which started widespread at the same time as this one. The other problem is in this thread: Microsoft JScrip runtime error "Object not a collection" Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find Someone else posted the same problem here about 4 months ago: https://stackoverflow.com/questions/55857445/sometimes-exists-property-is-not-supported Re: Error "Object doesn't support this property or method" using .Exists of returned object from Find Thank you all for your responses. I will answer all of your questions here: >>>What does the result of the variable "viewPort" return to you? ViewPort is a WinFormsObject with properties as it should have. The image below shows some of them including the property Exists with value True: As to response fromtristaanogre As I mentioned in my post, this happened to many objects not just this one. In all cases where the error occurred, the objects were found with Exists propertt being either False or True. The only change I can think of is to have .Net framework 4.8 installed. The error started after that. >>>We you able to find the solution? No Re: What .Net target and framework versions do TestComplete 11.31 and TextExecute 11.20 support Hi TanyaGorbunova, Many thanks! I have now found the relavant information. So I will make this as resolved. I copied the texts from the help file: " TestComplete supports testing .NET applications that use the following technologies: .NET Framework 2.0 - 4.5.1 (both 32-bit and 64-bit versions) "