https://journals.sagepub.com/doi/pdf...867X1501500407

Hi there,
I have quality of life data that i want to analyse using the qlqc30 command (https://journals.sagepub.com/doi/pdf...867X1501500407)
I have installed the package and sorted my vars (npat, q1-30, arm, visit) just like the manual tells me to. I also have other vars in my dataset of my own.

When I run the command I get the following error: "variable npat not found"
What happens is: stata deletes my variables npat, visit and arm.
It is non-exsistant. When I generate new vars for npat, visit and arm, it gets deleted again when running the command.
What am I doing wrong?