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I already tried to compile Qt from source code and then recompile Qwt, but plugin is still not valid for Designer. I used platform msvc2005 when compiling Qt, because I use Visual Studio 2005 and Qt VS Integration. Is this a problem? What else can I try? :confused:
Use the dependency walker to check if you have met all dependencies for the plugin.
Dependency Walker showed that there is no Qwt5.dll present. I copied that dll to windows\system32 just to be sure everything is ok. Plugin still does not work. There is no error anymore in dependency walker, just one warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module.
Check the Designer's "About Plugins" dialog. If there is a problem with a plugin it might report it there.
Sure, it says that qwt_designer_plugin.dll is not a valid Qt plugin. That is all.
Oh why oh why some precompiled stuff that just works doesnt exist.
Check this thread please: http://www.qtcentre.org/forum/f-qwt-...ner-12357.html