When I used it to caculate the formation energy of a compound. It gives errors when trying to calculate the energy of a free atom. While using the same struct file in 18.2 no errors appear.
I am using 19.1 which is almost same (official site do not recommend to update to 19.2 if you are using 19.1). Did not find any stability problem. However there are some patches which fix some reported error. See this https://github.com/gsabo/WIEN2k-Patches
This error has nothing to do with the energy of caculate the formation energy. This error occurred during initialization.
This error seems to be related to compiling code.
I have two suggestions:
1) Enter the desired directory and open the terminal in the same path and run the following command : init_lapw -b or init_lapw
If the same error appeared. Try testing it again on another material. If you still get the same error, it means that the code is not compiled correctly.
2) Try to apply the patch related to this version. Also check if the patch needs x nn . Because your error has been made in this program
I think the problem is with the structure. In the image NN-DIST is more then 32. That's very odd unless you intentionally did so. In that case you need to chose correct space group.