{"id":6873,"date":"2022-09-05T15:57:24","date_gmt":"2022-09-05T10:27:24","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-debug-hanging-savefiledialog\/"},"modified":"2022-09-05T15:57:24","modified_gmt":"2022-09-05T10:27:24","slug":"solved-how-to-debug-hanging-savefiledialog","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-debug-hanging-savefiledialog\/","title":{"rendered":"[Solved] How to debug hanging SaveFileDialog"},"content":{"rendered":"

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Excel freezes on Open\/Save As if a managed add-in is registered with a “Warmup” registry value, even if the add-in is not even loaded.<\/p>\n

The “Warmup” registry value, when set to 1 in an add-in’s registry key, was once supposed to cause Excel to load the VSTO runtime at startup, rather than when the first user interaction with the add-in occurred. Apparently, it was never implemented and has since been removed from Microsoft’s online documentation of the registry entries for VSTO add-ins<\/a>.<\/p>\n

Once I removed the “Warmup” value from my add-in’s registry key, Excel’s Open\/Save As dialogs no longer froze, nor did the add-in’s own SaveFileDialog.ShowDialog()<\/code> calls. I don’t know why this is, but evidently, the “Warmup” value does do something<\/em>.<\/p>\n

I was able to reproduce this with a dummy add-in that does not do anything. If that dummy add-in is registered in HKCU\\Software\\Microsoft\\Excel\\Addins<\/code> without the “Warmup” DWORD<\/code>, Excel works just fine. As soon as I add the DWORD<\/code> with a value of 1<\/code>, Excel freezes when I click Open or Save As — again, the dummy add-in does not do anything at all.<\/p>\n

So, if people get here wondering why their Office application freezes after installation of a VSTO add-in, I’d suggest to remove the “Warmup” value from the registry rather than spending hours debugging their code (as I did before I found out about “Warmup”).<\/p>\n

Feedback from my users is positive.<\/p>\n<\/p><\/div>\n

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solved How to debug hanging SaveFileDialog <\/p>\n","protected":false},"excerpt":{"rendered":"

[ad_1] Excel freezes on Open\/Save As if a managed add-in is registered with a “Warmup” registry value, even if the add-in is not even loaded. The “Warmup” registry value, when set to 1 in an add-in’s registry key, was once supposed to cause Excel to load the VSTO runtime at startup, rather than when the … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,400,1925,1926,1924],"class_list":["post-6873","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-excel","tag-freeze","tag-savefiledialog","tag-vsto"],"yoast_head":"\n[Solved] How to debug hanging SaveFileDialog - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-debug-hanging-savefiledialog\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to debug hanging SaveFileDialog - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Excel freezes on Open\/Save As if a managed add-in is registered with a “Warmup” registry value, even if the add-in is not even loaded. 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