Click Once application fails to fully launch when certain other applications are running

Questys Randy 1

Our click once application runs fine if everything else on the workstation is closed. When certain other applications, including Amazon Music and Visual Studio Code (when VS Code has updates available), are running the main window for our application will not appear even though we can see that it is running in task manager. As soon as the other application is closed our application appears and runs as expected..

Yan Gu - MSFT 2,676 Reputation points

2020-11-09T02:02:20.75+00:00

@Questys Randy Could you please tell me what kind of project you are using?
Questys Randy 1 Reputation point

2020-11-09T18:03:03.95+00:00

It is a Windows Forms application connecting to a WCF server.
Tianyu Sun-MSFT 27,356 Reputation points Microsoft Vendor

2020-11-10T06:51:57.853+00:00

Hi @Questys Randy , thank you for taking time to post this issue in Microsoft Q&A forum. I think the main window may need some resources(files, assemblies, components and RAM space…) which are used by other applications or processes, to finish initializing. So please kindly check the codes and settings of your application (related to main window) and try to increase the space of your workstation. Also, please kindly try to create a new Windows Forms project and test it again to see if its main window appears correctly. Besides, could you share me some code snippets and this will be useful for me to check further.
Questys Randy 1 Reputation point

2020-11-11T05:27:04.783+00:00

The issue is not related to memory or shared resources because launching the exe directly from Windows Explorer works every time. The issue only occurs when launching the click once appref file when those certain other applications are running. Launching the exe directly skips the update checks which we need to have in place when updates are released.
Tianyu Sun-MSFT 27,356 Reputation points Microsoft Vendor

2020-11-12T02:59:45.73+00:00

Hi @Questys Randy , thanks for your feedback. I can’t reproduce the situation via your description. So in order to solve the problem more effectively, it is recommended to report a problem on the Developer Community and you can get more professional answer. Thank you for your understanding.