How-to-guide.md

+## Fix issues
+
+### curegen
+
+The first time you run `mkbdr curegen` you may have this error:
+
+```
+sqlite3.OperationalError: /home/pguerin/miniconda3/envs/mkbdr_dep/lib/python3.9/site-packages/ete3/ncbi_taxonomy/SQLite-Levenshtein/levenshtein.sqlext.so: cannot open shared object file: No such file or directory
+```
+
+
+The solution is to navigate to the folder `../ete3/ncbi_taxonomy/SQLite-Levenshtein/` and run `make`.
+
+
+Reference : https://github.com/etetoolkit/ete/issues/173
+
+
+
+
 
 ## Usage