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PO.net wpf application startup issues
 

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    <p>I've got a quite strange startup behavior for my application.</p> <p>The first time the application is started the process takes up one CPU Core (50% on dual core, 25% on quad core) and RAM consumption stops at a specific value (each start the same, different on other machines/different build versions as we change the application around to test). </p> <p>If I start an other instance while the first is running the second instance starts normally.</p> <p>I inserted some logging into the application and it seems the application crashes the first time a UI element is shown. Initially logging ended just before the splash screen should show up - after removing the splash screen it stopped as a Messagebox Control should be shown.</p> <p>The issue happens on some machines, not all. Copying the same files to an other machine can "fix" the problem. If I deploy a debug compiled build, builded by my workstation the issue disappears completely.</p> <p>Additional Info (March 18th): <strong>The required "hanging" instances count seems to depend on the number of available cores.</strong> </p> <p>If the machine runs on a <em>dual core</em>* system, the <em>second process</em> starts, the first taking 50% CPU (= 1 core@100%). If the machine runs on a <em>quad core</em> system the *fourth proces*s starts, the first three taking 25% CPU each (= 3 cores@100%).</p> <p>Update (March 19th): <strong>So... we solved it!</strong> A colleague wrote a thread manager with some code to wait on something. This manager is called when UI elements are shown. Running a debug version or running the release version on a very slow VM (the machine which functioned fine has been a virtual one on a really busy machine) seem to change the timing and make it work.</p> <p>He said he implemented some sort of timeout to fix it. </p> <p>I will take a closer look at his solution (and why such strange things are required) on Monday and post an update here to provide a proper solution to my question for following visitors.</p> <p><strong>The bounty goes to Stephen Chung, thank you all for your help.</strong></p>
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    1. COIs the application always failing on the same machines? Which .NET version are you targeting? Same .NET version/service pack on all machines?
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    2. COSame machines, we are targeting .net 4.0. Installed .net Versions on all machines are 3.5 SP1 and 4.0 (complete)
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    3. COOne more thing; is the operating system the same on all machines?
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