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@surendrapatel_n_twitter You state that you imported the plugins for Emmet. How? If the plugin is not listed in the Plugin Admin, you would need to manually install it. You can open the plugins folder by using the "Open Plugins Folder" function under the Plugins menu. In the plugins folder, you create a folder of the same name as the plugin then copy the plugin .dll file into that folder. Any other dll files provided with the plugin go into the same folder. Please note that if you are running the 32-bit version of Notepad++, you would need to download and install the 32-bit version of the Emmet plugin. If running the 64-bit version of Notepad++, you would need to download and install the 64-bit version of Emmet.
@jmfey0517_gitlab You stated that you are trying to run a .txt file in Notepad++. Text files cannot be run. Please explain what you expect to happen when you attempt to run the text file. You also stated that you want to "run .txt to .html". Please state in more detail, step by step, what you are trying to do.