Solved
creo toolkit
creo 4.0 m100toolkit visual studio 2015 not working
creo 4.0 m100toolkit visual studio 2015 not working
Similar issue some time ago - "Visual Studio 2015 and Pro/Toolkit Version < 4.0": https://community.ptc.com/t5/Customization/Visual-Studio-2015-and-Pro-Toolkit-Version-lt-4-0/td-p/16465
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