[Gmsh] Points' identification number change after reloading

[look]

Dear gmsh list,

I have created a *.msh file from an imported patched *.stl file. After that I call the *.msh file in the *.geo file with the merge command. Everytime I reload the script via GUI my points’ identification numbers change.

Two questions:
- Why is this happening?
- How can I prevent gmsh from doing this?

Best regards!
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