I have create tool in library.
Tool name STD0.1A in "End Mill (non indexable)" and I create same name in "End Mill (indexable)"
I update each difference parameter tool in "Edit Machining Data Libraries"
When I load those tools to use. Parameter will read from first parameter tool only.
for this case i dont use "Machining data" to create parameter becuase I need to fig parameter for each tool.
Since the library reference is not unique this is really a user error.
You cannot specify two separate tools with the same library reference, since it is mandatory to have it unique.
I think that NX will not allow you to export two tools with the same library reference and you should never do such things through a text editor.
If you cheat, then the system will not work as expected.
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@Stefan_Pendl is correct. The libref must be unique. These are different tools with different materials.
I always recommend NOT to try to use the name or libref to describe tool parameters.