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I had a python project build with dev build 46 and i downloaded the dev build 54 today and tried to open the project but the open project dialog displayed the following message on the project name label <unrecognized project;missing plug-in?> please see the attached screen shot.
Created attachment 71634 [details] screen shot
*** Issue 150846 has been marked as a duplicate of this issue. ***
to Conform to the Netbeans project structure. All the packages were refactored to org.netbeans.modules.python. In doing this the decision was made to break all prior projects. the way to fix this is to delete the nbproject directory and recreate the project using existing sources.
verified